Task: Question Generation
Input (English): In addition to the Jazz Festival (described above), New Haven serves as the home city of the annual International Festival of Arts and Ideas. New Haven's Saint Patrick's Day parade, which began in 1842, is New England's oldest St. Patty's Day parade and draws the largest crowds of any one-day spectator event in Connecticut. The St. Andrew the Apostle Italian Festival has taken place in the historic Wooster Square neighborhood every year since 1900. Other parishes in the city celebrate the Feast of Saint Anthony of Padua and a carnival in honor of St. Bernadette Soubirous. New Haven celebrates Powder House Day every April on the New Haven Green to commemorate the city's entrance into the Revolutionary War. The annual Wooster Square Cherry Blossom Festival commemorates the 1973 planting of 72 Yoshino Japanese Cherry Blossom trees by the New Haven Historic Commission in collaboration with the New Haven Parks Department and residents of the neighborhood. The Festival now draws well over 5,000 visitors. The Film Fest New Haven has been held annually since 1995.
Output (English): What organization was responsible for the planting of several cherry blossom trees in 1973?