Sentence:  In late 1957 the M.P. ( Mouvement Populaire ) appeared and in the spring of 1958 the internal strains of the Istiqlal was revealed when the third Council of Government under Balafrej was formed without support from <WSD>progressive</WSD> elements in the party . 
Meaning of the word marked with <WSD> tags:  (of a card game or a dance) involving a series of sections for which the participants successively change place or relative position