Question:
Bernard Lewis, FBA (born 31 May 1916) is a British American historian specializing in oriental studies. He is also known as a public intellectual and political commentator. Lewis is the Cleveland E. Dodge Professor Emeritus of Near Eastern Studies at Princeton University. Lewis' expertise is in the history of Islam and the interaction between Islam and the West.
Lewis' influence extends beyond academia to the general public. He is a pioneer of the social and economic history of the Middle East and is famous for his extensive research of the Ottoman archives. He began his research career with the study of medieval Arab, especially Syrian, history. His first article, dedicated to professional guilds of medieval Islam, had been widely regarded as the most authoritative work on the subject for about thirty years. However, after the establishment of the state of Israel in 1948, scholars of Jewish origin found it more and more difficult to conduct archival and field research in the Arab countries, where they were suspected of espionage. Therefore, Lewis switched to the study of the Ottoman Empire, while continuing to research Arab history through the Ottoman archives which had only recently been opened to Western researchers. A series of articles that Lewis published over the next several years revolutionized the history of the Middle East by giving a broad picture of Islamic society, including its government, economy, and demographics.  Lewis argues that the Middle East is currently backward and its decline was a largely self-inflicted condition resulting from both culture and religion, as opposed to the post-colonialist view which posits the problems of the region as economic and political maldevelopment mainly due to the 19th-century European colonization. In his 1982 work Muslim Discovery of Europe, Lewis argues that Muslim societies could not keep pace with the West and that "Crusader successes were due in no small part to Muslim weakness." Further, he suggested that as early as the 11th century Islamic societies were decaying, primarily the byproduct of internal problems like "cultural arrogance," which was a barrier to creative borrowing, rather than external pressures like the Crusades.  In the wake of Soviet and Arab attempts to delegitimize Israel as a racist country, Lewis wrote a study of anti-Semitism, Semites and Anti-Semites (1986). In other works he argued Arab rage against Israel was disproportionate to other tragedies or injustices in the Muslim world, such as the Soviet invasion of Afghanistan and control of Muslim-majority land in Central Asia, the bloody and destructive fighting during the Hama uprising in Syria (1982), the Algerian civil war (1992-98), and the Iran-Iraq War (1980-88).  In addition to his scholarly works, Lewis wrote several influential books accessible to the general public: The Arabs in History (1950), The Middle East and the West (1964), and The Middle East (1995). In the wake of the September 11, 2001 attacks, the interest in Lewis's work surged, especially his 1990 essay The Roots of Muslim Rage. Three of his books were published after 9/11: What Went Wrong? (written before the attacks), which explored the reasons of the Muslim world's apprehension of (and sometimes outright hostility to) modernization; The Crisis of Islam; and Islam: The Religion and the People.
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what else did he research?

Answer:
Lewis switched to the study of the Ottoman Empire, while continuing to research Arab history through the Ottoman archives


Question:
Franklin Joseph Lymon (September 30, 1942 - February 27, 1968), known professionally as Frankie Lymon, was an American rock and roll/rhythm and blues singer and songwriter, best known as the boy soprano lead singer of the New York City-based early rock and roll group The Teenagers. The group was composed of five boys, all in their early to mid-teens. The original lineup of the Teenagers, an integrated group, included three African-American members, Frankie Lymon, Jimmy Merchant, and Sherman Garnes; and two Puerto Rican members, Joe Negroni and Herman Santiago. The Teenagers' first single, 1956's "Why Do Fools Fall in Love," was also its biggest hit.
Lymon's troubles extended to others after his death. After R&B singer Diana Ross returned "Why Do Fools Fall in Love" to the Top Ten in 1981, a major controversy concerning Lymon's estate ensued. Zola Taylor, Elizabeth Waters and Emira Eagle each approached Morris Levy, the music impresario who retained possession of Lymon's copyrights and his royalties, claiming to be Lymon's rightful widow; Lymon had neglected to divorce either of them. The complex issue resulted in lawsuits and counter-lawsuits, and in 1986 the first of several court cases concerning the ownership of Lymon's estate began.  Trying to determine who was indeed the lawful Mrs. Frankie Lymon was complicated by more issues. Waters was already married when she married Lymon; she had separated from her first husband, but their divorce was finalized in 1965, after she had married Lymon. Taylor claimed to have married Lymon in Mexico in 1965, but could produce no acceptable evidence of their union. Lymon's marriage to Eagle, on the other hand, was properly documented as having taken place at Beulah Grove Baptist Church in Augusta, Georgia, in 1967; however, the singer was still apparently twice-married and never divorced when he married Eagle. The first decision was made in Waters' favor; Eagle appealed, and in 1989, the Appellate Division of the New York State Supreme Court reversed the original decision and awarded Lymon's estate to Eagle.  However, the details of the case brought about another issue: whether Morris Levy was deserving of the songwriting co-credit on "Why Do Fools Fall in Love". Although early single releases of "Why Do Fools Fall in Love" credit Frankie Lymon, Herman Santiago and Jimmy Merchant as co-writers, later releases and cover versions were attributed to Lymon and George Goldner. When Goldner sold his music companies to Morris Levy in 1959, Levy's name began appearing as co-writer of "Why Do Fools Fall in Love" in place of Goldner's. Lymon was never paid his songwriting royalties during his lifetime; one result of Emira Eagle's legal victory was that Lymon's estate would finally begin receiving monetary compensation from his hit song's success. In 1987, Herman Santiago and Jimmy Merchant, both then poor, sued Morris Levy for their songwriting credits. In December 1992, the United States federal courts ruled that Santiago and Merchant were co-authors of "Why Do Fools Fall in Love". However, in 1996 the ruling was reversed by the Court of Appeals for the 2nd Circuit on the basis of the statute of limitations: copyright cases must be brought before a court within three years of the alleged civil violation, and Merchant and Santiago's lawsuit was not filed until 30 years later. Authorship of "Why Do Fools Fall in Love" currently remains in the names of Frankie Lymon and Morris Levy.
Answer this question using a quote from the text above:

what were his posthumous troubles?

Answer:
After R&B singer Diana Ross returned "Why Do Fools Fall in Love" to the Top Ten in 1981, a major controversy concerning Lymon's estate ensued.