Original sentence: During the Herut convention in 1966 he and Shmuel Tamir constitued the major opposition to Begin's leadership of the party, and the following year he and three other Herut MKs left the party to form the Free Centre
Edited sentence: During the Herut convention in 1966 he and Shmuel Tamir constituted the major opposition to Begin's leadership of the party, and the following year he and three other Herut MKs left the party to form the Free Centre