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 city in', Sentence: 'The Early Renaissance began in the city of Florence in Central Italy in the fourteenth century .'
city

Given Relationship: 'be festival of', Sentence: 'The home is costly perfection itself and the family has gathered to celebrate the great Christian festival Christmas .'
festival

Given Relationship: 'present at', Sentence: 'Malfait N. , Ramsay J.O. and Froda , S. , Estimation by the finite element method in a functional linear model , Paper presented at the International Conference on Measurement and Multivariate Analysis , Banff , May 2000 .'

presented