<|im_start|>user
Replace all years in the following passage with the century in which it occurred

Context:
Thomas David Gordon (born 1954) (also known as T. David Gordon) is a professor, media ecologist, author, pastor, and Reformed Christian theologian.<|im_end|>
<|im_start|>assistant
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.<|im_end|>
