Premise: Antonio Vivaldi . He composed many instrumental concertos , for the violin and a variety of other instruments , as well as sacred choral works and more than forty operas . Many of his compositions were written for the female music ensemble of the Ospedale della Pietà , a home for abandoned children where Vivaldi ( who had been ordained as a Catholic priest ) was employed from 1703 to 1715 and from 1723 to 1740 .
Hypothesis: Antonio Vivaldi was a composer.
Label: ENTAILMENT