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: "When was the Swiss professional tennis player born who won the singles title in The 2002 Toray Pan Pacific Open?" whose answer is 30 September 1980.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Martina Hingis birth date
Useful Output:

Doc 1: date of birth. 30 September 1980. 5 references. stated in · The Bud Collins  biography/Martina-Hingis · language of work or name · English · retrieved. 9
Doc 2: Hingis was born in Košice, Czechoslovakia, (now Slovakia), and played in her first tournament when she was just four. Her parents divorced when she was six,
Doc 3: Martina Hingis (44) is a tennis player from Switzerland. Click here for a full player profile.
Doc 4: Martina Hingis is a Swiss former professional tennis player renowned for her tactical instincts and unmatched finesse. She set a high bar in the sport with
Doc 5:  Date: Sep 30, 1980. Martina Hingis profile image. Height: 5′6″. Residence  Martina Hingis Biography. Hingis made history by becoming the youngest Grand