Input: Read this: Time has long been a major subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. Some simple definitions of time include "time is what clocks measure", which is a problematically vague and self-referential definition that utilizes the device used to measure the subject as the definition of the subject, and "time is what keeps everything from happening at once", which is without substantive meaning in the absence of the definition of simultaneity in the context of the limitations of human sensation, observation of events, and the perception of such events.
Question: What is an example of a simple definition of time?

Output: time is what clocks measure

Input: Read this: The early synapsid mammalian ancestors were sphenacodont pelycosaurs, a group that produced the non-mammalian Dimetrodon. At the end of the Carboniferous period, this group diverged from the sauropsid line that led to today's reptiles and birds. The line following the stem group Sphenacodontia split-off several diverse groups of non-mammalian synapsidssometimes referred to as mammal-like reptilesbefore giving rise to the proto-mammals (Therapsida) in the early Mesozoic era. The modern mammalian orders arose in the Paleogene and Neogene periods of the Cenozoic era, after the extinction of the non-avian dinosaurs 66 million years ago.
Question: At the end of the Carboniferous period what did the Neogene diverge from that led to today's reptiles and birds?

Output: unanswerable

Input: Read this: The Bulgarian Empire was in decline by the 14th century, and the ascendancy of Serbia was marked by the Serbian victory over the Bulgarians in the Battle of Velbazhd in 1330. By 1346, the Serbian king Stefan Dusan had been proclaimed emperor. Yet Serbian dominance was short-lived; the Serbian army led by the Lazar Hrebljevanovic was defeated by the Ottomans at the Battle of Kosovo in 1389, where most of the Serbian nobility was killed and the south of the country came under Ottoman occupation, as much of southern Bulgaria had become Ottoman territory in 1371. Northern remnants of Bulgaria were finally conquered by 1396, Serbia fell in 1459, Bosnia in 1463, and Albania was finally subordinated in 1479 only a few years after the death of Skanderbeg. Belgrade, an Hungarian domain at the time, was the last large Balkan city to fall under Ottoman rule, in 1521. By the end of the medieval period, the entire Balkan peninsula was annexed by, or became vassal to, the Ottomans.
Question: In what year didn't Belgrade fall to the Ottomans?

Output: unanswerable

Input: Read this: In 1902, Spalding, who by this time had revamped the roster to boast what would soon be one of the best teams of the early century, sold the club to Jim Hart. The franchise was nicknamed the Cubs by the Chicago Daily News in 1902, although not officially becoming the Chicago Cubs until the 1907 season. During this period, which has become known as baseball's dead-ball era, Cub infielders Joe Tinker, Johnny Evers, and Frank Chance were made famous as a double-play combination by Franklin P. Adams' poem Baseball's Sad Lexicon. The poem first appeared in the July 18, 1910 edition of the New York Evening Mail. Mordecai "Three-Finger" Brown, Jack Taylor, Ed Reulbach, Jack Pfiester, and Orval Overall were several key pitchers for the Cubs during this time period. With Chance acting as player-manager from 1905 to 1912, the Cubs won four pennants and two World Series titles over a five-year span. Although they fell to the "Hitless Wonders" White Sox in the 1906 World Series, the Cubs recorded a record 116 victories and the best winning percentage (.763) in Major League history. With mostly the same roster, Chicago won back-to-back World Series championships in 1907 and 1908, becoming the first Major League club to play three times in the Fall Classic and the first to win it twice. However, the Cubs have not won a World Series since; this remains the longest championship drought in North American professional sports.
Question: Who wrote the poem Baseball's Sad Lexicon?

Output:
Franklin P. Adams