Complex sentence: With support from the local McMahon Foundation, the new facility opened its doors to the public in 1961 as, the Museum of the Great Plains; an building located in Elmer Thomas Park and managed under the City of Lawton.
Split into simpler sentences: With support from the local McMahon Foundation, the new facility opened in 1961 as the Museum of the Great Plains. The museum is an building located in Elmer Thomas Park and managed under the City of Lawton.