Complex sentence: On 20 January 1974 the M-19 stole from the Villa of Bolivar in Bogota the sword of the Liberator, which became the symbol of fight under the slogan of "Bolivar your sword returns to the fight".
Split into simpler sentences: On 20 January 1974 the M-19 stole Simón Bolívar's sword from the Quinta de Bolivar. The sword became the symbol of the guerrillas' fight under the slogan of "Bolivar your sword returns to the fight".