In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

[EX Q]: Question: What year did construction begin on the dam that the river passes through before Afterbay Dam? Passage:The Bighorn River begins as the Wind River in the Rocky Mountains at Wind River Lake, near Two Ocean Mountain and the summit of Togwotee Pass. The Wind River flows southeast receiving the east fork of the Wind River from the north, and enters the Wind River Basin, flowing past Dubois and Johnstown, to Riverton, where it receives the Little Wind River. The river then changes direction to the northeast and then the north, flowing into Boysen Reservoir, which is formed by Boysen Dam. Below the dam it enters the Wind River Canyon, where the river narrows and forms many rapids. At the end of the canyon the Wind River widens out in an area called the Wedding of the Waters where it becomes the Bighorn River and enters the Bighorn Basin. The Bighorn continues northward, passing through Thermopolis, Worland, and Basin. At Greybull it receives the Greybull River, and about north of that confluence it enters Bighorn Lake, where it is joined by the Shoshone River. North of the confluence with the Shoshone, the reservoir narrows as the river enters the Bighorn Canyon, where it crosses into Montana. At the end of the canyon, the river passes through Yellowtail Dam and Afterbay Dam. The river turns to the northeast and enters the Great Plains. At Hardin the river is joined by the Little Bighorn River. Approximately downriver from the Little Bighorn, in Big Horn County, the Bighorn empties into the Yellowstone.

[EX A]: b

[EX Q]: Question: What city did Stevens complete a Ph.D. in? Passage:In 1980, Stevens joined the Army under their split option training program and conducted basic training at Fort Dix, New Jersey and advanced individual training at Fort Sam Houston, Texas. While engaged in his military service, Stevens entered the University of Southern Maine in the Computer Science program in 1981. However, an enthusiastic professor (John Ricci) converted him to the study of Chemistry. He spent two summers working as an intern at the Brookhaven National Laboratory in Long Island with Professor Ricci, and Drs. Thomas Koetzle and Dick McMullan, where he first learned how to determine the molecular structure of compounds by X-ray and neutron diffraction. While there he also met a University of Southern California research team led by Dr. Robert Bau; after he obtained a Bachelor of Science degree in Chemistry at USM, he entered the University of Southern California in pursuit of a Doctor of Philosophy degree in Chemistry working with Professor Robert Bau and Nobel Laureate Professor, George Olah. He completed his Ph.D. in 26 months, graduating in 1988.

[EX A]: b

[EX Q]: Question: Which of the musicians that Wright played with in a trio for Jack Berch's NBC show had the longest career? Passage:In 1938, he had his first playing job at a Chinese night club in Oakland, called the New Shanghai Cafe and Terrace Bowl, which boasted a 2-manual, 6-rank Wurlitzer; the show was broadcast nightly by an Oakland radio station. In 1941, he joined San Francisco radio station KFRC and on the Blue Network by 1942. In December, 1942 he started performing at the San Francisco Fox Theater on Saturday nights. In late 1944, he relocated to New York City to work as organist for NBC radio. He began recording at this time, first cutting 78 RPM records for Syd Nathan's King Records and Regent Records, in addition to securing contracts for transcription disks on the Thesaurus, Associated, and Muzak labels. In New York, he was a guest on the Paul Whiteman"Stairway to the Stars" radio program (May 21, 1946) and Percy Faith, as well as on the network shows of Bing Crosby and Perry Como. He also conducted his own orchestra on the Robert Q. Lewis show and began a seven-year stint playing in a trio with Charles Magnante, accordionist, and Tony Mottola, guitarist, for Jack Berch's NBC show sponsored by the Prudential Insurance Company. The trio, with added bassist Bobby Haggart, recorded five "Soundies," as well.

[EX A]:
a