Input question: Which is the main river flowing through the Portuguese capital of Lisbon?

Output answer: tagus

Input question: In the numbering system used in baseball scorekeeping (where the pitcher is #1, shortstop #6, etc), what position is #2?

Output answer: catcher

Input question: Which King of England, from 1399-1413, was born at Bolingbroke Castle in Lincoln shire in 1366?

Output answer: henry iv

Input question: Which word completes the name of these British butterflies - 'Lulworth', 'Chequered' and 'Grizzled'?

Output answer:
skipper