Scope note: This class comprises the activities that result in an instance of E39 Actor becoming a member of an instance of E74 Group. This class does not imply initiative by either party. It may be the initiative of a third party. Typical scenarios include becoming a member of a social organisation, becoming employee of a company, marriage, the adoption of a child by a family and the inauguration of somebody into an official position. Examples: - The election of Sir Isaac Newton as Member of Parliament for the University of Cambridge to the Convention Parliament of 1689 - The inauguration of Mikhail Sergeyevich Gorbachev as leader of the Union of Soviet Socialist Republics (USSR) in 1985 - The implementation of the membership treaty between EU and Denmark January 1. 1973 In First Order Logic: E85(x) ⊃ E7(x)