Question: What is the population of the town in ghana where  71 people were killed and 13 others injured in a head-on collision between a bus and a truck  on 18 February 2016?
Sentence (from "2016 Ghana bus collision"): A regional police spokesman said: “It was very serious … we had to use chainsaws to cut through parts of the mangled bus to get bodies and survivors out.
Relevant evidence: No