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Defending champions Bengal and Kerala qualified for the semi-finals of the 72nd edition of the national championship for the Santosh Trophy by registering wins over Chandigarh and and Maharashtra respectively here on Sunday. For Bengal, Bidyasagar Singh scored the only goal of the match in the 18th minute while Kerala had a field day with Rahul Raj (23rd), Jithin MS (39th) and Rahul KP (58th) getting on the scoresheet.