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: 'be capital of', Sentence: 'Lao Mountain Coffee is a roasting company based in Vientiane , the capital of Laos .'
capital

Given Relationship: 'attack', Sentence: 'Hitler attacked Poland on September 1 .'
attacked

Given Relationship: 'be city in', Sentence: 'Houston , the 4th largest city in the United States , is an international city with 54 foreign government consular offices .'
city