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.

Ex Input:
Passage: Symbiosis played a major role in the co-evolution of flowering plants and the animals that pollinate them. Many plants that are pollinated by insects, bats, or birds have highly specialized flowers modified to promote pollination by a specific pollinator that is also correspondingly adapted. The first flowering plants in the fossil record had relatively simple flowers. Adaptive speciation quickly gave rise to many diverse groups of plants, and, at the same time, corresponding speciation occurred in certain insect groups. Some groups of plants developed nectar and large sticky pollen, while insects evolved more specialized morphologies to access and collect these rich food sources. In some taxa of plants and insects the relationship has become dependent, where the plant species can only be pollinated by one species of insect. Question: What did some plants produce when flowers became less simple?

Ex Output:
nectar and large sticky pollen


Ex Input:
Passage: Southeast Raleigh is bounded by downtown on the west, Garner on the southwest, and rural Wake County to the southeast. The area includes areas along Rock Quarry Road, Poole Road, and New Bern Avenue. Primary neighborhoods include Chastain, Chavis Heights, Raleigh Country Club, Southgate, Kingwood Forest, Rochester Heights, Emerald Village and Biltmore Hills. Time Warner Cable Music Pavilion (formerly Alltel Pavilion and Walnut Creek Amphitheatre) is one of the region's major outdoor concert venues and is located on Rock Quarry Road. Shaw University is located in this part of the city. Question: What neighborhoods does Southeast Raleigh have?

Ex Output:
Chastain, Chavis Heights, Raleigh Country Club,


Ex Input:
Passage: Darwin's barnacle studies convinced him that variation arose constantly and not just in response to changed circumstances. In 1854, he completed the last part of his Beagle-related writing and began working full-time on evolution. His thinking changed from the view that species formed in isolated populations only, as on islands, to an emphasis on speciation without isolation; that is, he saw increasing specialisation within large stable populations as continuously exploiting new ecological niches. He conducted empirical research focusing on difficulties with his theory. He studied the developmental and anatomical differences between different breeds of many domestic animals, became actively involved in fancy pigeon breeding, and experimented (with the help of his son Francis) on ways that plant seeds and animals might disperse across oceans to colonise distant islands. By 1856, his theory was much more sophisticated, with a mass of supporting evidence. Question: What creatures did Darwin study that made him believe variation arose constantly?

Ex Output:

barnacle