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.

Q: Given Relationship: 'be surround by', Sentence: 'Lesotho is geographically surrounded by South Africa and economically integrated with it as well .'

A: surrounded
****
Q: Given Relationship: 'speak at', Sentence: 'He would probably rather forget the principles I heard him defend in a closed forum last year arguing against inviting Ahmadinejad to speak at Columbia after a previous attempt to have him speak at the institution without Bollinger 's knowledge fell through .'

A: speak
****
Q: Given Relationship: 'be invade by', Sentence: 'China invaded Tibet in 1950-51 .'

A:
invaded
****