Replace all years in the following passage with the century in which it occurred
Thomas David Gordon (born 1954) (also known as T. David Gordon) is a professor, media ecologist, author, pastor, and Reformed Christian theologian.
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.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
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Thomas David Gordon (born 1954) (also known as T. David Gordon) is a professor, media ecologist, author, pastor, and Reformed Christian theologian.
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Answer the following query.
Replace all years in the following passage with the century in which it occurred

user
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.
assistant