Complex sentence: When they attempt to investigate the whereabouts of Calculus, the local Indios prove to be peculiarly tight-lipped, but then Tintin befriends a young Quechua boy named Zorrino after saving him from Spaniard bullies.
Split into simpler sentences: When they attempt to investigate the whereabouts of Calculus, the local Indios prove to be peculiarly tight-lipped. But then Tintin befriends a young Quechua boy named Zorrino after saving him from Spaniard bullies.