Conversation so far:
Does Stephen Stills have any children?
Stephen Stills' son Christopher was born in 1974.
Did Stephen Stills have any other children besides Christopher?
Stephen Stills' children were Eleanor, Justin, Henry, Alex, Jennifer, Oliver Ragland
Did Stephen Stills have any additional children besides Christopher, Eleanor, Justin, Henry, Alex, Jennifer, and Oliver Ragland?
Stephen Stills did not have additional children besides Christopher, Eleanor, Justin, Henry, Alex, Jennifer, and Oliver Ragland
Did Stephen Stills have any other daughters besides Eleanor and Jennifer?
Stephen Stills did not have additional children besides Christopher, Eleanor, Justin, Henry, Alex, Jennifer, and Oliver Ragland

Question: What other children does he have?
Self-contained rewrite: What other children does Stephen Stills have besides Christopher, Eleanor, Justin, Henry, Alex, Jennifer, and Oliver Ragland??