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": ""}
 MTV  canada    subsp. vx Vy   bVN=% RAII     &U3=J Prince Edward Island          h   caryophyllales  7?|t (bab.) webb & chater Polygonum oxyspermum subsp. raii +G    POL Y6ONACEAE X$,c  Polygonum y   OXYSPERMUM 7f d  
{"catalogNumber": "", "order": "Caryophyllales", "family": "Polygonaceae", "scientificName": "Polygonum oxyspermum subsp. raii", "scientificNameAuthorship": "(Bab.) Webb & Chater", "genus": "Polygonum", "subgenus": "", "specificEpithet": "oxyspermum", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "raii", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Prince Edward Island", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}