MONTAGUE, Mass. — A western Massachusetts high school is asking members of the community to help pick a news sports mascot after dropping its Native American-themed nickname.The task force charged with finding a new mascot for Turners Falls High School has published a poll on its Facebook page so residents, alumni and students can choose from among 16 semifinalists.The Gill-Montague Regional School Committee, over the objection of many residents and alumni, last year decided to drop Indians.