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.

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 .'
invaded

Given Relationship: 'reveal in', Sentence: 'A very careful and thorough research and scriptural study reveals that the God of Abraham , Isaac and Jacob is the pre-incarnate Christ .'
reveals

Given Relationship: 'be president of', Sentence: 'Congratulations go to Barack Obama on being the first black president of the United States of America .'
president