"There Were Too Many to Check, So I Just Added One": Using an LLM-Powered Agent to Reduce Redundant Reports in Crowdsourced Reporting. - Yen-Chun Lin; Pei-Hua Tsai; Yu-Hao Weng; Hsin-Lun Chiu; Chu-Yun Ma; Yung-Ju Chang (DIS, 2026)