sentences:  In retaliation to the attacks by the Falangists, anarchists killed three bodyguards of the Falangist leader José Antonio Primo de Rivera.The government then closed the CNT's centers in Madrid, and arrested David Antona and Cipriano Mera, two CNT militants.After periods of clandestine operation followed by other shorter periods of legalization, in 1936 the CNT was finally legalized, and would remain legal until the end of the Civil War.