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'.

Passage: James Graham (January 7, 1793 – September 25, 1851) a Congressional Representative from North Carolina; born in Lincoln County, North Carolina, January 7, 1793; brother of William Alexander Graham; pursued classical studies and graduated from the University of North Carolina at Chapel Hill in 1814; studied law; was admitted to the bar in 1818 and commenced practice in Rutherford County, North Carolina; member of the State house of representatives in 1822, 1823, 1824, 1828, and 1829; elected as a National Republican to the Twenty-third Congress (March 4, 1833 – March 3, 1835); presented credentials as a National Republican Member-elect to the Twenty-fourth Congress and served from March 4, 1835, to March 29, 1836, when the seat was declared vacant; subsequently elected as a National Republican to the same Congress; reelected as a Whig to the Twenty-fifth, Twenty-sixth, and Twenty-seventh Congresses and served from December 5, 1836, to March 3, 1843; chairman, Committee on Public Expenditures (Twenty-seventh Congress); unsuccessful candidate for reelection in 1842 to the Twenty-eighth Congress; elected as a Whig to the Twenty-ninth Congress (March 4, 1845 – March 3, 1847); was not a candidate for renomination in 1846; engaged in agricultural pursuits near Rutherfordton, North Carolina, where he died September 25, 1851.
 Link Information: William Alexander Graham (September 5, 1804August 11, 1875)  Question: Who is the older between James Graham and his brother?
Answer: James Graham

Passage: Hardstone carving falls under the general category of glyptic art, which covers small carvings and sculpture in all categories of stone. The definition in this context of "hardstone" is unscientific and not very rigid, but excludes "soft" stones such as soapstone (steatite) and minerals such as alabaster, both widely used for carving, as well as typical stones for building and monumental sculpture, such as marble and other types of limestone, and sandstone. These are typically not capable of a fine finish in very small carvings, and would wear in prolonged use. In other contexts, such as architecture, "hard stone" and "soft stone" have different meanings, referring to actual measured hardness using the Mohs scale of mineral hardness and other measures. Some rocks used in architecture and monumental sculpture, such as granite, are at least as hard as the gemstones, and others such as malachite are relatively soft but counted as hardstones because of their rarity and fine colour.
 Link Information: none Question: What stone is rated the highest on the Mohs scale of mineral hardness?
Answer: none

Passage: Mairson received a B.A. in Mathematics from Yale University in 1978 and a Ph.D. in Computer Science from Stanford University in 1984 under the supervision of Jeffrey Ullman. His Ph.D. thesis, The Program Complexity of Searching a Table, won the Machtey Award at the 1983 IEEE Symposium on Foundations of Computer Science (FOCS). Mairson was a Postdoctoral researcher at INRIA Rocqencourt from 1984 to 1985, at Stanford University in 1985, and at the University of Oxford in 1986. He held a Visiting Professor position from 1999 to 2001 at Boston University. From 2005 to 2007, Mairson has served as the Chair of the Faculty Senate at Brandeis. He is currently an Associate Editor of the journal Logical Methods in Computer Science and Information and Computation, and sits on the editorial board of Higher-Order and Symbolic Computation.
 Link Information: none Question: Which school had more students the year Mairson received his B.A. in Mathematics, Yale or Stanford?

Answer: none