Teacher:In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Teacher: Now, understand the problem? Solve this instance: Question: In what country did the Battle of Acheloos take place? Passage 1:Doubleday's invention of baseball was the finding of a panel appointed by Albert Spalding, a former star pitcher and club executive, who had become the leading American sporting goods entrepreneur and sports publisher. Debate on baseball's origins had raged for decades, heating up in the first years of the 20th century, due in part to a 1903 essay baseball historian Henry Chadwick wrote in Spalding's Official Baseball Guide stating that baseball gradually evolved from English game of “rounders”. To end argument, speculation, and innuendo, Spalding organized the Mills Commission in 1905. The members were baseball figures, not historians: Spalding's friend Abraham G. Mills, a former National League president; two United States Senators, former NL president Morgan Bulkeley and former Washington club president Arthur Gorman; former NL president and lifelong secretary-treasurer Nick Young; two other star players turned sporting goods entrepreneurs (George Wright and Alfred Reach); and AAU president James E. Sullivan.
 Passage 2:Hero cults could be of the utmost political importance. When Cleisthenes divided the Athenians into new demes for voting, he consulted Delphi on what heroes he should name each division after. According to Herodotus, the Spartans attributed their conquest of Arcadia to their theft of the bones of Orestes from the Arcadian town of Tegea. Heroes in myth often had close but conflicted relationships with the gods. Thus Heracles's name means "the glory of Hera", even though he was tormented all his life by the queen of the gods. This was even truer in their cult appearances. Perhaps the most striking example is the Athenian king Erechtheus, whom Poseidon killed for choosing Athena over him as the city's patron god. When the Athenians worshiped Erechtheus on the Acropolis, they invoked him as Poseidon Erechtheus.
 Passage 3:The facts regarding Constantine's life are confused and subject to conjecture. It is known that at the time of Emperor Leo VI the Wise (r. 886–912), he restored a monastery near the Church of the Holy Apostles, which is nowadays identified with the Fenari Isa Mosque on account of a partial inscription commemorating its dedication to the Theotokos. The date of the inauguration is traditionally placed in 907/908. Constantine Lips also participated in the failed coup of the prominent general Constantine Doukas against the infant Constantine VII Porphyrogennetos (r. 913–959) in July 913, after the death of Leo's brother and successor Alexander (r. 912–913). In its wake, several nobles who had been or were suspected of being involved in the coup were executed, while others fled the city, amongst them Constantine Lips. On August 20, 917, he fell at the Battle of Acheloos, fighting against the Bulgarian forces under Simeon I.

Student:
3