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": ""}
    u. WITH WEEDY VEGETATION ON PREVISUALY CULTIVATED FIELDS. Eragrostis mexicana subsp. mexicana *$/    MEXICANA q1  25.2654 z3    $h mexicana    7 tk6 SUBSP.  1963-07-19  aa9      I. SÃ¡nchez Vega H7_Oe     frank w. gould ?    
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Eragrostis mexicana subsp. mexicana", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "mexicana", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "mexicana", "identifiedBy": "I. S\u00c3\u00a1nchez Vega", "recordedBy": "Frank W. Gould", "recordNumber": "", "verbatimEventDate": "1963-07-19", "habitat": "With weedy vegetation on previsualy cultivated fields.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "25.2654", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}