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.
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Question: Given Relationship: 'be chief of', Sentence: 'We work for the Chief Executive Officer also known as The President of the United States .'

Answer: Chief


Question: Given Relationship: 'be country in', Sentence: 'Germany is one of the most powerful countries in Europe , yet remains little understood , by itself or the rest of the world .'

Answer: countries


Question: Given Relationship: 'be language of', Sentence: 'French is the official second language of all of Canada .'

Answer:
language