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: 'cross', Sentence: 'This might entail that Caesar did not choose to cross the Rubicon , but that he was acting in a determined manner , like a machine .'
cross

Given Relationship: 'be mayor of', Sentence: 'And former New York mayor Rudy Giuliani suggested men of a certain age get checked for prostate cancer , following in the footsteps of former US senator Bob Dole , whose appearances in Viagra ads are credited with persuading more men to discuss erectile dysfunction with their doctors .'
mayor

Given Relationship: 'be month in', Sentence: 'The months of April and May are easily the busiest hiring months in Thailand , and last year , June was very busy as well .'

months