Instructions: 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.
Input: Question: How many plays did Michael Cristofer write? Passage 1:In 1977, Gregorio returned to Broadway after an eight-year hiatus in the original production of Michael Cristofer's The Shadow Box as Agnes; she garnered nominations for the Tony Award for Best Performance by a Featured Actress in a Play and the Drama Desk Award for Outstanding Featured Actress in a Play. Since then her theatre appearances have been sporadic. She appeared as Laurie in the Off-Broadway production of David Blomquist's Weekends Like Other People, at the Marymount Manhattan Theatre in 1982. The following year she returned to Broadway as Beatrice in the original production of A View from the Bridge at the Ambassador Theatre, and again in 1988 as Helga in the original production of M. Butterfly at the Eugene O'Neill Theatre. In 1993 she appeared as Karen Frick in the Manhattan Theatre Club's production of Arthur Miller's The Last Yankee and in 2000 she portrayed the roles of Lena and Sandra in Beth Henley's Family Week at the Century Center for the Performing Arts.
 Passage 2:Upon graduation from high school Long attended the College of William and Mary where he studied history and graduated in 1969, after spending many of his high school and undergraduate summers with his family at Manteo, North Carolina, where Mary, William, Robert, and Laura worked for Paul Green's outdoor drama, The Lost Colony. He then attended the University of North Carolina at Chapel Hill to pursue a Ph.D. in art history. At Chapel Hill he met visiting professor Betty Smith who suggested he apply to the design program at Yale University. He left UNC and went to the Yale School of Drama to study set design. It was here that he met Sigourney Weaver (his roommate at the time), Wendy Wasserstein, Meryl Streep, Christopher Durang, and Paul Rudnick, who were all also students at the university. While at Yale he studied under designer Ming Cho Lee, whom he has credited with being a major influence on his work.
 Passage 3:Diagnosis of MCC begins with a clinical examination of the skin and lymph nodes. Following, definitive diagnosis of Merkel cell carcinoma (MCC) requires examination of biopsy tissue to identify its histopathologic features. An ideal biopsy specimen is either a punch biopsy or a full-thickness incisional biopsy of the skin including full-thickness dermis and subcutaneous fat. On light microscopy, MCC shows basaloid tumor nests with neuroendocrine features ("salt and pepper" chromatin, scarce cytoplasm, and brisk mitotic activity). In addition to standard examination under light microscopy, immunohistochemistry (IHC) is also generally required to differentiate MCC from other morphologically similar tumors such as small cell lung cancer, the small cell variant of melanoma, various cutaneous leukemic/lymphoid neoplasms, and Ewing's sarcoma. Similarly, most experts recommend longitudinal imaging of the chest, typically a CT scan, to rule out that the possibility that the skin lesion is a skin metastasis of an underlying small cell carcinoma of the lung. Once an MCC diagnosis is made, a sentinel lymph node biopsy is recommended as a part of the staging work-up needed to determine prognosis and subsequent treatment options.

Output:
1