Parsed documentation:
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isPlural (http://rs.gbif.org/terms/1.0/isPlural)

@return [String]
This value is true if the vernacular name it qualifies refers to a plural
form of the name.

Vocabulary: http://rs.gbif.org/vocabulary/basic/boolean.xml

Example: The term "Schoolies" is the plural form of a name used along
the coastal Northeastern U.S. for groups of juvenile fish of the species,
Morone saxatilis.
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