This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Input: Consider Input: Passage: On 30 September, Zhou Enlai warned the United States that China was prepared to intervene in Korea if the United States crossed the 38th parallel. Zhou attempted to advise North Korean commanders on how to conduct a general withdrawal by using the same tactics which had allowed Chinese communist forces to successfully escape Chiang Kai-shek's Encirclement Campaigns in the 1930s, but by some accounts North Korean commanders did not utilize these tactics effectively. Historian Bruce Cumings argues, however, the KPA's rapid withdrawal was strategic, with troops melting into the mountains from where they could launch guerrilla raids on the UN forces spread out on the coasts. Question: Who vowed to intervene if the US was to engage in conflict North of the 38th parallel?

Output: China


Input: Consider Input: Passage: North Raleigh is an expansive, diverse, and fast-growing suburban area of the city that is home to established neighborhoods to the south along with many newly built subdivisions and along its northern fringes. The area generally falls North of Millbrook Road. It is primarily suburban with large shopping areas. Primary neighborhoods and subdivisions in North Raleigh include Harrington Grove, Springdale, Dominion Park, Bedford, Bent Tree, Brentwood, Brier Creek, Brookhaven, Black Horse Run, Coachman's Trail, Crossgate, Crosswinds, Falls River, Hidden Valley, Lake Park, North Haven, North Ridge, Oakcroft, Shannon Woods, Six Forks Station, Springdale, Stonebridge, Stone Creek, Stonehenge, Summerfield, Valley Estates, Wakefield, Weathersfield, Windsor Forest, and Wood Valley. The area is served by a number of primary transportation corridors including Glenwood Avenue U.S. Route 70, Interstate 540, Wake Forest Road, Millbrook Road, Lynn Road, Six Forks Road, Spring Forest Road, Creedmoor Road, Leesville Road, Strickland Road, and North Hills Drive. Question: What type of area is North Raleigh?

Output: expansive, diverse, and fast-growing


Input: Consider Input: Passage: The chloroplast membranes sometimes protrude out into the cytoplasm, forming a stromule, or stroma-containing tubule. Stromules are very rare in chloroplasts, and are much more common in other plastids like chromoplasts and amyloplasts in petals and roots, respectively. They may exist to increase the chloroplast's surface area for cross-membrane transport, because they are often branched and tangled with the endoplasmic reticulum. When they were first observed in 1962, some plant biologists dismissed the structures as artifactual, claiming that stromules were just oddly shaped chloroplasts with constricted regions or dividing chloroplasts. However, there is a growing body of evidence that stromules are functional, integral features of plant cell plastids, not merely artifacts. Question: What is a stromule?


Output: stroma-containing tubule