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: 'stand for', Sentence: 'MMA stands for Mixed Martial Arts and it is a system in which all types of fighting styles are used to see , which one is best .'

Answer: stands

Question: Given Relationship: 'be officer of', Sentence: 'Section 2. Officers of the Club shall consist of a President , Vice President , Secretary and Treasurer .'

Answer: Officers

Question: Given Relationship: 'be son of', Sentence: 'Seba was the son of Cush , and Sheba was Cush 's grandson .'

Answer:
son