Input question: Which river has its source in Guinea and flows through Mali, Niger and Benin before emptying into the Gulf of Guinea in Nigeria?

Output answer: niger

Input question: Which post in Gordon Brown's government was held by David Miliband?

Output answer: foreign secretary

Input question: On July 5, 1996, scientists from the Roslin Institute near Edinburgh, Scotland, created Dolly, the first cloned mammal. What type of animal was she?

Output answer: sheep

Input question: Who commanded the Roman army that invaded Britain in 55BC?

Output answer:
julius caesar