Answer the question from the given passage. Your answer should be directly extracted from the passage, and it should be a single entity, name, or number, not a sentence.

Passage: Environmentalists are concerned about loss of biodiversity that will result from destruction of the forest, and also about the release of the carbon contained within the vegetation, which could accelerate global warming. Amazonian evergreen forests account for about 10% of the world's terrestrial primary productivity and 10% of the carbon stores in ecosystems—of the order of 1.1 × 1011 metric tonnes of carbon. Amazonian forests are estimated to have accumulated 0.62 ± 0.37 tons of carbon per hectare per year between 1975 and 1996. Question: What are environmentalists concerned about losing in the Amazon forest?
biodiversity

Passage: The concept of prime number is so important that it has been generalized in different ways in various branches of mathematics. Generally, 'prime' indicates minimality or indecomposability, in an appropriate sense. For example, the prime field is the smallest subfield of a field F containing both 0 and 1. It is either Q or the finite field with p elements, whence the name. Often a second, additional meaning is intended by using the word prime, namely that any object can be, essentially uniquely, decomposed into its prime components. For example, in knot theory, a prime knot is a knot that is indecomposable in the sense that it cannot be written as the knot sum of two nontrivial knots. Any knot can be uniquely expressed as a connected sum of prime knots. Prime models and prime 3-manifolds are other examples of this type. Question: What does it mean for a knot to be considered indecomposable?
it cannot be written as the knot sum of two nontrivial knots

Passage: However, a problem emerged regarding the directions taken by ABC and UPT. In 1950, Noble appointed Robert Kintner to be ABC's president while he himself served as its CEO, a position he would hold until his death in 1958. Despite the promise of non-interference between ABC and UPT, Goldenson had to intervene in ABC's decisions because of financial problems and the FCC's long period of indecision. Goldenson added to the confusion when, in October 1954, he proposed a merger between UPT and the DuMont Television Network, which was also mired in financial trouble. As part of this merger, the network would have been renamed 'ABC-DuMont' for five years, and DuMont would have received $5 million in cash, room on the schedule for existing DuMont programming, and guaranteed advertising time for DuMont Laboratories receivers. In addition, to comply with FCC ownership restrictions, it would have been required to sell either WABC-TV or DuMont owned-and-operated station WABD in the New York City market, as well as two other stations. The merged ABC-DuMont would have had the resources to compete with CBS and NBC. Question: Who was appointed to be ABC's president by Noble in 1950?
Robert Kintner