Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

parnassiinae is a subfamily of butterflies.
parnassiinae

yoshikazu goto (後藤 義一, goto yoshikazu, born february 20, 1964) is a japanese professional athlete.
yoshikazu goto

bonson, alpes-maritimes is a commune.

bonson, alpes-maritimes