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.
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Question: l'elisir d'amore is an italian comic opera in two acts.

Answer: l'elisir d'amore


Question: "polythene pam" is a song written by john lennon, credited to lennon/mccartney, and performed by the beatles on their album "abbey road".

Answer: polythene pam


Question: plumbaginaceae is a family of flowering plants are about 560 species in 10 genera found all over the world.

Answer:
plumbaginaceae