var vtn_player_type = "vp";var ven_video_key="NjIwODg2fHwxNDcxfHwwfHx8fHx8";var ven_width="660";var ven_height="409";A former electrician and his wife who kept 271 works of art by Picasso in their garage for close to 40 years went on trial in France.