Table:
text: List of soccer clubs in Australia
South Australia
Level 4
Team Coach Home_Ground Location_ Founded
Adelaide Cobras Kris Trajanovski Weigall Oval Plympton 1972
Adelaide Comets Barney Smith Santos Stadium Mile End 1994
Adelaide Hills Hawks Doug Paterson Hawks Nest Woodside 1991
Adelaide Olympic Unknown Thebarton Oval Thebarton 1978
Cumberland United Nick Pantsaras A.A. Bailey Reserve Clarence Gardens 1943
Enfield City Falcons Unknown Rushworth Reserve Enfield 1946
Noarlunga United Bulldogs Unknown Wilfred Taylor Reserve Noarlunga 1963
Playford City Patriots Unknown Ramsay Park Elizabeth 1956
Port Adelaide Pirates Derek Hall John Hart Reserve Port Adelaide 1903
White City Woodville Adrian Santrac Frank Mitchell Park Woodville West 1949

Question: What is the average year in the list of football clubs in Level 4 South Australia that the club was founded in Enfield with an unknown manager?

Question: Where is the club founded in 1946 which has an unknown manager from South Australia Tier 4 Football Clubs list located?