Q: In this task, a passage will be given and the goal is to identify an event from the passage. An event is defined as a single word representing something that happened, is happening, or may happen. An event can be factual or hypothetical, positive or negative, certain or uncertain. While most events are based on verbs, an event can also be based on a noun (ex. storm, snow, rainfall) or a copula verb (is, was, been, etc.). The event must not be a pronoun or an adjective. For noun events with multiple words, use the last word in the phrase as event.
Passage: An experimental vaccine developed by GlaxoSmithKline that targets two viruses responsible for 70 percent of uterine cancer cases triggers twice the immune response in girls aged 10 to 14 than in those aged 15 to 24, the British pharmaceutical firm said Saturday. The results of phase 3 clinical trials were presented at an annual conference on infectious diseases under way this weekend in Washington.
A:
developed