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 Input:
Question: Was the record company that signed Rising Sons founded before 1900? Passage:In 1964 he moved to Santa Monica, California, and formed Rising Sons with fellow blues rock musician Ry Cooder and Jessie Lee Kincaid, landing a record deal with Columbia Records soon after. The group was one of the first interracial bands of the period, which likely made them commercially unviable. An album was never released (though a single was) and the band soon broke up, though Legacy Records did release The Rising Sons Featuring Taj Mahal and Ry Cooder in 1992 with material from that period. During this time Mahal was working with others, musicians like Howlin' Wolf, Buddy Guy, Lightnin' Hopkins, and Muddy Waters. Mahal stayed with Columbia after the Rising Sons to begin his solo career, releasing the self-titled Taj Mahal in 1968, The Natch'l Blues in 1969, and Giant Step/De Old Folks at Home with Kiowa session musician Jesse Ed Davis from Oklahoma, who played guitar and piano (also in 1969). During this time he and Cooder worked with the Rolling Stones, with whom he has performed at various times throughout his career. In 1968, he performed in the film The Rolling Stones Rock and Roll Circus. He recorded a total of twelve albums for Columbia from the late 1960s into the 1970s. His work of the 1970s was especially important, in that his releases began incorporating West Indian and Caribbean music, jazz and reggae into the mix. In 1972, he acted in and wrote the film score for the movie Sounder, which starred Cicely Tyson. He reprised his role and returned as composer in the sequel, Part 2, Sounder.


Ex Output:
b


Ex Input:
Question: Were the Oz books the only books L. Frank Baum ever wrote? Passage:The Land of Ev is a fictional country in the Oz books of L. Frank Baum and his successors. Its exact location is unclear between text and maps. The Road to Oz states that Ev is to the north of the Land of Oz, and in Ozma of Oz, Princess Ozma of Oz and her procession enter the Munchkin Country and meet the King of the Munchkins upon leaving the palace at Evna, the capital city. Subsequent books place Ev nearer to the Winkie Country, and the map on the endpapers of Tik-Tok of Oz shows the Munchkin Country as having no northern border with the desert that surrounds Oz, as a thin strip of the Gillikin Country extends even farther east than most of the Munchkin Country. This map depicts Ev as a small country to the northwest (the compass rose is reversed) of Oz, with the Dominions of the Nome King as a separate area. James E. Haff and Dick Martin's map, following the text, place the Nome Kingdom under an Ev that takes up the entire portion allotted to the Nome King's dominions on Baum's map.


Ex Output:
a


Ex Input:
Question: Is the power plant at Old Salt Lake still in use? Passage:The Old Salt Lake was used by the Chowigna Indians who dug up salt from the bottom. Old Salt Lake was in what is now Redondo Beach, California. In 1856 Henry Johnson and lawyer William Allanson purchased the Old Salt Lake land and built a salt evaporation pond to make and sell salt. The site of Old Salt Lake was designated a California Historic Landmark (No.373) on Sept. 6, 1941. On December 15, 1854 Manuel Dominguez sold 215 acres of the Rancho San Pedro for $500 to Los Angeles businessmen Henry Allanson and William Johnson. Johnson and Allanson also built a boiling house with 48 wood fired kettles to make salt faster than the evaporation pond. Johnson and Allanson exported much of the salt produced by transporting it 10 miles overland to the Port of San Pedro. Spanish Missionaries also dug up salt from the lake in the time of Spanish missions in California. The Salt lake was a large pond that was 600 by 1800 feet, it was fed by a natural spring. Johnson and Allanson shut down the salt works in 1862 and sold it to businessman, Frances Mellus. Frances Mellus ran the Pacific Salt Works at the site until 1881. In 1881 Liverpool Salt Works at the Salton Sea, a rival company, purchased Pacific Salt Works and the closed. The lake was 600 feet from the Redondo Beach sea shore at an elevation of about 10 feet. In 1955 a granite marker was put up at the site on Harbor Drive near the AES electricity power plant. In 1901 the fire boiler were removed and the buildings were abandoned for almost 20 years, in 1924 all structures at the site were removed. Southern California Edison built the south Bay power plant on the site in 1948. In 1998 AES Corporation purchased the power plant. 


Ex Output:

b