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 focus of', Sentence: 'The Guttmacher Institute , a nonprofit research group focusing on sexual and reproductive health , recently analyzed data on abortions from 1979 to 2004 and found the number of teens having abortions has declined significantly .'
focusing

Given Relationship: 'be president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'
president

Given Relationship: 'be country in', Sentence: 'Do n't let anyone tell you otherwise : despite the public 's constant dissatisfaction with its government and a lumbering economy that gives rise to occasional crime waves , Argentina remains one of the safest countries in Latin America .'

countries