I thumbed through my CMOS and although I'm sure it's in there, I couldn't find it. Which is correct:
"The keynote address was followed by invited speakers, one of which was Dianne Wyatt, Lou Tate's replacement at the EPA."
OR
"The keynote address was followed by invited speakers, one of whom was Dianne Wyatt, Lou Tate's replacement at the EPA."
"Of which" sounds better, but because "speakers" are people, "of whom" seems like it would be more correct.
"The keynote address was followed by invited speakers, one of which was Dianne Wyatt, Lou Tate's replacement at the EPA."
OR
"The keynote address was followed by invited speakers, one of whom was Dianne Wyatt, Lou Tate's replacement at the EPA."
"Of which" sounds better, but because "speakers" are people, "of whom" seems like it would be more correct.