### Instruction: Replace all years in the following passage with the century in which it occurred
### Input: Thomas David Gordon (born 1954) (also known as T. David Gordon) is a professor, media ecologist, author, pastor, and Reformed Christian theologian.
### Response: Thomas David Gordon (born in the 20th century) (also known as T. David Gordon) is a professor, media ecologist, author, pastor, and Reformed Christian theologian.