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": ""}
1960-09-29  z-=z  M.H. Mayfield <EB1   DENTATA ;P     p# malpighiales   euphorbia 6 r    Tamaulipas axq$p   k EUPHORBIACEAE    5r -98.65997 no data  _     k(YxD SHORT BRUSH ON A SHLE HILL   Ci michx.   ROADSIDE ANNUALS u  
{"catalogNumber": "", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "Euphorbia", "subgenus": "", "specificEpithet": "dentata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "M.H. Mayfield", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1960-09-29", "habitat": "short brush on a shale hill", "occurrenceRemarks": "Roadside annuals", "associatedTaxa": "", "country": "", "stateProvince": "Tamaulipas", "county": "no data", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-98.65997", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}