Original: In 1985 San Fermin day (July 7) he escaped from prison with Iñaki Pikabea as there was a concert in the jail with Basque singer Imanol Larzabal, they hid themselves inside a loudspeaker.
Simplified: In 1985 he escaped from prison with Iñaki Pikaea during a concert in the jail with Basque singer Imanol Larzabal.