From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

[Q]: Given Relationship: 'be form of', Sentence: 'This suggests that ATIVAN is a very buried form of ASD.'
[A]: form


[Q]: Given Relationship: 'be island in', Sentence: 'Cuba is the bigger island extension of the biggest Antilles .'
[A]: island


[Q]: Given Relationship: 'begin in', Sentence: 'Registration begins December 13th , 2008 ...'
[A]:
begins