You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who played mark greene's first wife on er?" whose answer is Christine Harnos.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who played mark greene's first wife on er
Useful Output:

Doc 1: Elizabeth (Corday) Greene - Mark's (widowed) wife. He and Elizabeth started going out in late season 5 and dated throughout season 6. In early season 7, they
Doc 2: Julianna Margulies portrayed Carol Hathaway, an ER nurse and ex-girlfriend of Dr. Doug Ross. Nurse Carol Hathaway on ER. Julianna Margulies as
Doc 3: ER (1994). Jennifer Greene (Christine Harnos). Mark Greene's wife.
Doc 4: Parminder Nagra. After gaining attention for Bend It Like Beckham, Parminder Nagra came to the US for ER where she played Dr. Neela Rasgotra
Doc 5: Olivia Benson on NBC's long-running Law & Order: SVU, she appeared in 13 episodes of ER in 1997-98 as Cynthia Hooper, a County General desk