Answer the question from the given passage. Your answer should be directly extracted from the passage, and it should be a single entity, name, or number, not a sentence.

Passage: Members of the United Methodist Church who identify with the pro-life position have organized into the Taskforce of United Methodists on Abortion and Sexuality (TUMAS) to further their position within the denomination. There was an attempt to withdraw the United Methodist Church membership in the Religious Coalition for Reproductive Choice at their General Conference, held in May 2012, with a petition that passed through the legislative subcommittee and committee votes, but was not given a floor vote. Rev. Paul T. Stallsworth, president of the Taskforce of United Methodists on Abortion and Sexuality said he 'had every reason to believe' that pro-life delegates would have won a floor vote. Question: In what year was there an attempt to withdraw the UMC membership?
2012