Railway Minister Mamata Banerjee isn’t just about firebrand politics; she appears to have a well-developed sense of humour too. On Monday, actor-turned-Trinamool Congress MP Tapas Pal entered Banerjee’s office in Parliament dressed entirely in black. Banerjee greeted him with a warm smile and proceeded to recite, “Ba ba black sheep have you any wool/ Yes sir, yes sir Tapas’ bag full.” Unable to figure out whether Banerjee was complimenting him or being caustic, Pal silently left after a few minutes.