Song title in both "The Sound of Music" and "West Side Story" (5)

I believe the answer is:

maria

(Other definitions for maria that I've seen before include "Dark planes on the moon; girl's name" , "Lunar plains; girl's name" , "Black --, -- Theresa" , "one from West Side Story" , "Plains on the moon; girl's name" .)

I've seen this clue in The New York Times.

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