Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
      Weedy opening in RR ballast M1     UN michigan  Y  Poaceae     ON S. SIDE OF TRACKS ON E. SIDE OF US-27 CA. 1/2 MI. S. OF B.L.-94 IN THE CITY OF MARSHALL. MARSHALL TWP. T2S, R6W, SEC.29 SW1/4 2G.        MINOR  65  eragrostis GB$G    1990-08-03 8  
{"catalogNumber": "", "order": "", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Eragrostis", "subgenus": "", "specificEpithet": "minor", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1990-08-03", "habitat": "Weedy opening in RR ballast", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "on S. side of tracks on E. side of US-27 ca. 1/2 mi. S. of B.L.-94 in the city of Marshall. Marshall Twp. T2S, R6W, Sec.29 SW1/4", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}