Example of an Observations made about a location - an oyster farm

{
  "resourceType" : "Observation",
  "id" : "vp-oyster",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: Observation</b><a name=\"vp-oyster\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource Observation &quot;vp-oyster&quot; </p></div><p><b>identifier</b>: id: 20171014-1234 (use: OFFICIAL)</p><p><b>status</b>: preliminary</p><p><b>code</b>: <span title=\"  \n    Observations are often coded in multiple code systems.\n      - LOINC\n\t\t- or SNOMED\n      -and/or the source system may provides its own &quot;local&quot; code, which may be less or more granular than LOINC.\n\tIn this example there is only local codes\n    \">OYSTER TESTING <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#41857-4 &quot;Vibrio parahaemolyticus DNA [Presence] in Unspecified specimen by Probe and target amplification method&quot;; test-codes#VP MULTI PCR &quot;VP MULTI PCR&quot;)</span></span></p><p><b>subject</b>: <span>: Sonoma oyster farm</span></p><p><b>effective</b>: 2017-10-12</p><p><b>issued</b>: 15 Oct 2017, 10:11:24 am</p><p><b>performer</b>: <a href=\"practitioner-example-f005-al.html\">Practitioner/f005: A. Langeveld</a> &quot;Langeveld ANNE&quot;</p><p><b>value</b>: <span title=\"  results of this Qualtiattive PCR is a choice of Positive/Negative and Inconclusive  \">POSITIVE <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#10828004 &quot;Positive (qualifier value)&quot;; result-codes#POSITIVE)</span></span></p><p><b>interpretation</b>: Abnormal <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/4.0.0/CodeSystem-v3-ObservationInterpretation.html\">ObservationInterpretation</a>#A)</span></p><p><b>specimen</b>: <a name=\"group1\"> </a></p><blockquote><p/><p><a name=\"group1\"> </a></p><p><b>type</b>: animal</p><p><b>membership</b>: enumerated</p><blockquote><p><b>member</b></p><p><b>entity</b>: <a href=\"#bed1\">#bed1</a></p></blockquote><blockquote><p><b>member</b></p><p><b>entity</b>: <a href=\"#bed2\">#bed2</a></p></blockquote></blockquote><h3>ReferenceRanges</h3><table class=\"grid\"><tr><td>-</td><td><b>Text</b></td></tr><tr><td>*</td><td>NEGATIVE</td></tr></table></div>"
  },
  "contained" : [{
    "resourceType" : "Specimen",
    "id" : "bed1",
    "note" : [{
      "text" : "Live Oysters Acc#20171014-1234 from Bed 1"
    }]
  },
  {
    "resourceType" : "Specimen",
    "id" : "bed2",
    "note" : [{
      "text" : "Live Oysters Acc#20171014-1234 from Bed 2"
    }]
  },
  {
    "resourceType" : "Group",
    "id" : "group1",
    "type" : "animal",
    "membership" : "enumerated",
    "member" : [{
      "entity" : {
        "reference" : "#bed1"
      }
    },
    {
      "entity" : {
        "reference" : "#bed2"
      }
    }]
  }],
  "identifier" : [{
    "use" : "official",
    "system" : "http://sonomacounty.ca.gov/Health/Public-Health/Laboratory",
    "value" : "20171014-1234"
  }],
  "status" : "preliminary",
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "41857-4",
      "display" : "Vibrio parahaemolyticus DNA [Presence] in Unspecified specimen by Probe and target amplification method"
    },
    {
      "system" : "http://sonomacounty.ca.gov/Health/Public-Health/Laboratory/test-codes",
      "code" : "VP MULTI PCR",
      "display" : "VP MULTI PCR"
    }],
    "text" : "OYSTER TESTING"
  },
  "subject" : {
    "display" : "Sonoma oyster farm"
  },
  "effectiveDateTime" : "2017-10-12",
  "issued" : "2017-10-14T23:11:24Z",
  "performer" : [{
    "reference" : "Practitioner/f005",
    "display" : "A. Langeveld"
  }],
  "valueCodeableConcept" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "10828004",
      "display" : "Positive (qualifier value)"
    },
    {
      "system" : "http://sonomacounty.ca.gov/Health/Public-Health/Laboratory/result-codes",
      "code" : "POSITIVE",
      "display" : "POSITIVE"
    }],
    "text" : "POSITIVE"
  },
  "interpretation" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
      "code" : "A",
      "display" : "Abnormal"
    }]
  }],
  "specimen" : {
    "reference" : "#group1"
  },
  "referenceRange" : [{
    "text" : "NEGATIVE"
  }]
}