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": ""}
2004-06-04 <JHUX      U 2140   "approx. 20 plants. flowers yellow." 2`$;;   N big rapids twp. grounds of big rapidfs middle school near river.     hl) Stehen Ross  Q$] edward g. voss in recently worked and seeded soil of "riverwalk" among grass seedlings, alog sidewalk. Vu3       9z sisymbrium altissimum  michigan /n<l  Mecosta KH    rv P ALTISSIMUM   l. c 1>   _f 1221252  Xw SISYMBRIUM
{"catalogNumber": "1221252", "order": "", "family": "", "scientificName": "Sisymbrium altissimum", "scientificNameAuthorship": "L.", "genus": "Sisymbrium", "subgenus": "", "specificEpithet": "altissimum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "Stephen Ross", "recordNumber": "2140", "verbatimEventDate": "2004-06-04", "habitat": "In recently worked and seeded soil of \"Riverwalk\" among grass seedlings, along sidewalk.", "occurrenceRemarks": "\"Approx. 20 plants. Flowers yellow.\"", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Mecosta", "municipality": "", "locality": "Big Rapids Twp. Grounds of Big Rapids Middle School near river.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}