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: "The 2016 City of Onkaparinga ATP Challenger took place in a metropolitan suburb how far south of the Central Business District of Adelaide?" whose answer is 20 km.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Happy Valley Adelaide location distance to Adelaide CBD
Useful Output:

Doc 1:  Happy Valley reservoir was constructed between 1892 and 1897.  Distance from Adelaide CBD. Areas (Distance), 1. 1-40km from Adelaide
Doc 2: Happy Valley Reservoir is bounded by Main South Road, Black Road, Happy Valley Drive and Chandlers Hill Road.  Distance from Adelaide CBD.
Doc 3: Stop 39F Chandlers Hill Rd - North side is 260 meters away, 4 min walk. Stop 43 Chandlers Hill Rd - South side is 870 meters away, 11 min walk.
Doc 4: Distances to cities in Australia ; From Happy Valley to Canberra, 965 km, 600 mi ; From Happy Valley to Adelaide, 18 km, 11 mi ; From Happy Valley to Gold Coast
Doc 5: Happy Valley. Happy Valley is a metropolitan suburb of Adelaide, South Australia. It is located 20 km south of the Central Business District of Adelaide.