That topic is very interesting.

I attended the meeting as his surrogate.

This old book has an epigraph and a colophon written by the author himself.

She gave birth to a child as a surrogate mother.

His style of music reminds me of the 70s.

He expanded the company in one generation.

He spoke for me.

His novel was actually the work of a ghostwriter.

He is using honey as a substitute for sugar.

His powerful influence was felt by all people.