Input: Read this: As a relatively small and isolated oceanic island, Norfolk has few land birds but a high degree of endemicity among them. Many of the endemic species and subspecies have become extinct as a result of massive clearance of the island's native vegetation of subtropical rainforest for agriculture, hunting and persecution as agricultural pests. The birds have also suffered from the introduction of mammals such as rats, cats, pigs and goats, as well as from introduced competitors such as common blackbirds and crimson rosellas.
Question: What is the second thing that caused many of the birds of Norfolk Island to thrive?

Output: unanswerable

Input: Read this: Interracial relationships have had a long history in North America and the United States, beginning with the intermixing of European explorers and soldiers, who took native women as companions. After European settlement increased, traders and fur trappers often married or had unions with women of native tribes. In the 17th century, faced with a continuing, critical labor shortage, colonists primarily in the Chesapeake Bay Colony, imported Africans as laborers, sometimes as indentured servants and, increasingly, as slaves. African slaves were also imported into New York and other northern ports by the Dutch and later English. Some African slaves were freed by their masters during these early years.
Question: Who was sometimes freed by their masters during the later years?

Output: unanswerable

Input: Read this: With the majority of Nigeria's populace in the rural areas, the major languages of communication in the country remain indigenous languages. Some of the largest of these, notably Yoruba and Igbo, have derived standardised languages from a number of different dialects and are widely spoken by those ethnic groups. Nigerian Pidgin English, often known simply as 'Pidgin' or 'Broken' (Broken English), is also a popular lingua franca, though with varying regional influences on dialect and slang. The pidgin English or Nigerian English is widely spoken within the Niger Delta Regions, predominately in Warri, Sapele, Port Harcourt, Agenebode, Ewu, and Benin City.
Question: What type of languages are the most popular in Nigeria?

Output: indigenous

Input: Read this: The city hockey club, Southampton Hockey Club, founded in 1938, is now one of the largest and highly regarded clubs in Hampshire, fielding 7 senior men's and 5 senior ladies teams on a weekly basis along with boys' and girls' teams from 6 upwards.
Question: Weekly, how many senior ladies teams does Southampton Hockey Club field?

Output:
5