In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Ex Input:
Passage: Ten laps into the race, Michael Waltrip passed pole-sitter Jeff Gordon for the lead. On Lap 19, the caution flag was thrown after a multi-car accident. Waltrip continued leading until Lap 55, in which Dale Earnhardt Incorporated teammate Dale Earnhardt, Jr. After Bobby Hamilton, Jr. had an accident on Lap 70, Earnhardt led the race into pit road, but was pushed out by Gordon and Brian Vickers, and fell to fifteenth, giving Mike Wallace the lead entering Lap 74. Shepherd pitted on the following lap, and Morgan Shepherd took the lead. However, Shepherd would later pit, as Gordon regained the lead. Waltrip then retook the lead from Gordon on Lap 86, though Gordon then took the lead again 13 laps later. Ten laps later, Gordon pitted, and Waltrip was given the lead. On the ensuing lap, Earnhardt took the lead, though he later pitted, and Jimmy Spencer gained the lead. On Lap 113, Spencer lost the lead to Gordon when he pitted, who led the pit stops on Lap 139. Dave Blaney stayed out, and took the lead, though Ryan Newman gained first-place when Blaney went to pit road. Newman pitted on Lap 143, giving Tony Stewart the lead. With ten laps left in the race, Hendrick Motorsports teammates Jeff Gordon and Jimmie Johnson followed in third and fourth, respectively, behind Tony Stewart and Dale Earnhardt, Jr. Johnson then pushed Gordon past Stewart and Earnhardt, and Gordon subsequently won, his fourth of the season and second consecutive. The victory by Gordon made him the first driver since Cale Yarborough to win the Pepsi 400 from the pole. A version of the race's waning moments was included in the prologue of the video game , which involved Johnson pushing Gordon past Earnhardt.
 Link Information: Yarborough has been married to Betty Jo Thigpen since 1961 and they have three daughters Question: How many children did the man have who was was the last driver before Gordon to win the Pepsi 400 from the pole?

Ex Output:
Answer: three 


Ex Input:
Passage: Watson graduated in 1943 with BS in electrical engineering from Iowa State College. From 1943 to 1946 he was a researcher at the United States Naval Research Laboratory in Washington, D.C. During his work for the U.S. Navy he went to night school at George Washington University. He graduated from the University of Iowa with Ph.D. in 1948 with thesis The polarizability of the meson-charge cloud of a neutron in an external electrostatic field. He was from 1948 to 1949 an Atomic Energy Commission (AEC) Fellow at the Institute for Advanced Study and from 1949 to 1951 an AEC Fellow at the Berkeley Radiation Laboratory. He was from 1951 to 1954 an assistant professor of physics at Indiana University and from 1954 to 1957 an associate professor of physics at the University of Wisconsin, Madison. In 1953 he was elected a fellow of the American Physical Society. From 1957 to 1981 he was a staff member of Lawrence Berkeley National Laboratory, as well as a professor of physics at the University of California, Berkeley. In 1974 he was elected a member of the National Academy of Sciences. From 1981 to 1991 he was the director of the Marine Physical Laboratory, Scripps Institute of Oceanography, as well as a professor of physical oceanography at the University of California, San Diego. In 1991 he retired as professor emeritus. His doctoral students include Shang-keng Ma.
 Link Information: 

The National Academy of Sciences Building is located at 2101 Constitution Avenue, in northwest Washington, D.C.; Question: Where is the organization to which Watson was elected in 1974 headquartered? 

Ex Output:
Answer: Washington, D.C


Ex Input:
Passage: Jethro Tull are an English progressive rock band from Blackpool. Formed in December 1967, the group originally included vocalist and flautist Ian Anderson, guitarist and backing vocalist Mick Abrahams, bassist Glenn Cornick and drummer Clive Bunker. After contributing to the band's debut album This Was, Abrahams left Jethro Tull in December 1968, citing disagreements with the band's "basic policies, both musically and otherwise". He was replaced before the end of the year by Martin Barre, after rehearsals and stand-in performances by David O'List and Tony Iommi. Keyboardist John Evan was added to the band's lineup in April 1970, after contributing to Benefit as a guest performer. By the end of the year, Cornick had left the band due to "musical differences", with Jeffrey Hammond-Hammond taking his place. Anderson was left as the sole original member of the group by May 1971, when Bunker also left due to their heavy touring schedule. He was replaced by Barriemore Barlow.
 Link Information: Ian Scott Anderson (born 10 August 1947 Question: Which original member of Jethro Tull was the youngest?

Ex Output:

Answer:  Mick Abrahams,