Each sentence contains an appositive phrase. determine whether the appositive phrase is essential or non-essential. mark the sentence that punctuates the appositive phrase correctly. 1) a. ashe's first title a singles title was in 1965. b. ashe's first title, a singles title, was in 1965. 2) a. the keystone cops popular silent film characters debuted in 1912. b. the keystone cops, popular silent film characters, debuted in 1912. 3) a. this trip, the result of an election bet, took ten days. b. this trip the result, of an election bet, took ten days. 4) a. presidential candidate abraham lincoln had just won the election. b. presidential candidate, abraham lincoln, had just won the election.