In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Input: Consider Input: How does a chestnut tree form its heartwood?, Context: The term heartwood derives solely from its position and not from any vital importance to the tree. This is evidenced by the fact that a tree can thrive with its heart completely decayed. Some species begin to form heartwood very early in life, so having only a thin layer of live sapwood, while in others the change comes slowly. Thin sapwood is characteristic of such species as chestnut, black locust, mulberry, osage-orange, and sassafras, while in maple, ash, hickory, hackberry, beech, and pine, thick sapwood is the rule. Others never form heartwood.

Output: the change comes slowly

Input: Consider Input: What first lady was a member?, Context: In 1975, a group of Chicago Cubs fans based in Washington, D.C. formed the Emil Verban Society. The society is a select club of high profile Cub fans, currently headed by Illinois Senator Dick Durbin which is named for Emil Verban, who in three seasons with the Cubs in the 1940s batted .280 with 39 runs batted in and one home run. Verban was picked as the epitome of a Cub player, explains columnist George Will, because "He exemplified mediocrity under pressure, he was competent but obscure and typifying of the work ethics." Verban initially believed he was being ridiculed, but his ill feeling disappeared several years later when he was flown to Washington to meet President Ronald Reagan, also a society member, at the White House. Hillary Clinton, Jim Belushi, Joe Mantegna, Rahm Emanuel, Dick Cheney and many others have been included among its membership.

Output: Hillary Clinton

Input: Consider Input: How does the gulf stream get to newcastle?, Context: The climate in Newcastle is oceanic (Koppen Cfb) and significantly milder than some other locations in the world at a similar latitude, due to the warming influence of the Gulf Stream (via the North Atlantic Drift). Being in the rain shadow of the North Pennines, it is among the driest cities in the UK. Temperature extremes recorded at Newcastle Weather Centre include 32.5 C (90.5 F) during August 1990 down to 12.6 C (9.3 F) during January 1982. In contrast to other areas influenced by the Gulf Stream, such as inland Scandinavia, Newcastle has milder winters and cooler summers, similar to the remainder of the British Isles.
Output: North Atlantic Drift