Cannes, Veteran director Shyam Benegal's "Manthan", a film financed by 5 lakh farmers of Gujarat 48 years ago, made a triumphant return to the spotlight and public consciousness with its screening at the Cannes Film Festival. Veteran actor Naseeruddin Shah walked the red carpet at Cannes along with wife Ratna Pathak Shah, late co-star Smita Patil's son Prateik Babbar, Dr …