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.

[EX Q]: Given Relationship: 'be friend of', Sentence: 'I have always taken the position that Israel is a friend of the United States , and that friends should always stand up for one another , even in difficult times .'
[EX A]: friend

[EX Q]: Given Relationship: 'invade', Sentence: 'After the United States invaded Grenada in 1983 , the communist junta of Hudson Austin and Bernard Gourd was replaced by a government that allowed a free press and opposition parties to flourish .'
[EX A]: invaded

[EX Q]: Given Relationship: 'be implementation of', Sentence: 'The other will implement a multiple virtual machine environment on Ruby and JRuby , an open source Java code implementation of the increasingly popular Ruby programming language , with the hopes of increasing those programs ' efficiency .'
[EX A]:
implementation