Club Deportivo Utiel is a football team based in Utiel in the autonomous community of Valencian Community. Founded in 1945, the team plays in Tercera División – Group 6. The club's home ground is "La Celadilla", which has a capacity of 1,500 spectators.
During the second half of the 20th century, Club Deportivo Utiel was formed.
The context says the club was created in 1945. A century is 100 years long, so 1945 is in the first half of the 20th century, not the second half. The second half of the century did not start until after 1950. The computer might have assumed that because the statement says 20th century it is correct without realizing that the statement is only talking about one part of the century. 