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.

Question: Did Yahya fight any of the other claimants? Passage 1:Yahya bin Hamza was a member of the Zaidi elite, but not of the dynasty of the Rassids that usually provided imams. He was a 13th-generation descendant of imam Ali ar-Ridha (d. 818). The old Yemeni imam al-Mahdi Muhammad bin al-Mutahhar had conquered large highland territories from the Rasulid Dynasty, including the commercially and politically important city San'a. After his demise in 1328, no less than four claimants for the imamate surfaced. Apart from Yahya, these included an-Nasir Ali bin Salah, Ahmad bin Ali al-Fathi, and the deceased imam's son al-Wathiq al-Mutahhar. Yahya emerged as the supreme figure and quickly secured San'a. With the city as his base, he waged war in the following years against Taiyabi Ismaili groups of the Hamdan tribe in the Wadi Dahr. The Rasulids were in no position to take back their lost lands in the Yemeni highland, leaving the Zaidi positions unthreatened. The imam was a prominent scholar who authored Al-Intisar, the most comprehensive Zaydiyyah law book, and Ad-Da'wa al-amma, a work encouraging struggle for the true faith. It was popularly said that the number of pages he wrote were equal to the days he lived. Al-Mu'ayyad Yahya died in 1346 (or, in another account, 1349), and was buried in Dhamar. On his death, San'a was seized by two Zaidi brothers, Ibrahim bin Abdallah and Da'ud bin Abdallah, who ruled as emirs and did not claim the imam title. Their family would control San'a until 1381.
 Passage 2:He has been active in industry, making significant contributions as a key designer and developer of projects such as IBM's VM/370 operating system and Lockheed's DIALOG information retrieval system. He has served as a consultant to many major corporations, such as IBM, AT&T, and Citicorp. He has also been the founder or co-founder of several high-tech firms, including Intercomp (acquired by Logicon), Mitrol (acquired by General Electric's Information Systems Company), Cambridge Institute for Information Systems, founded with John J. Donovan (its successor corporation was named Cambridge Technology Group, founded by John J. Donovan), iAggregate (acquired by ArsDigita, which was subsequently acquired by Red Hat), and now operates a hotel in the 14th century Langley Castle in England. Madnick is involved with the research effort at BMLL Technologies, a Cambridge spin-off working in the field of machine learning on the limit order book.
 Passage 3:She later appeared on BBC2 in a Mantovani Show of the Week and in The Adventure of Sherlock Holmes' Smarter Brother, starring with Gene Wilder (1975). This was followed by several West End musicals, including the stage adaptation of Dad's Army in 1975–1976, the 1976 musical adaptation of Liza of Lambeth, the 1977 stage adaptation of The Point!, The Phantom of the Opera as the Wardrobe Mistress/Confidante' (1986–1988), Beethoven's Tenth, and Evita. She also appeared in the British provinces in productions of Born Again by Julian Barry (1990), Fiddler on the Roof, and Oliver! (as Mrs. Bumble). Television and film credits include The Sweeney (1978; the final episode: "Jack or Knave"), The Strange Affair of Adelaide Harris (1979), Play for Today (1979; Episode: "Billy"), Bless Me Father (1981), BBC2 Playhouse (1982; Episode: "Aubrey"), Grange Hill (1983; two episodes), Mitch (1984), The Bill (1990) and Prisoner of Honor, starring Richard Dreyfuss (1991). She also appeared in about three dozen television commercials.
1