Dozois consistently expressed a particular interest in adventure SF and space opera, which he collectively referred to as "center-core SF".
Dozois always said he was especially interested in adventure science fiction and space opera.
Dozois always said he was especially interested in adventure science fiction and space opera.
Simplify this sentence: Dozois consistently expressed a particular interest in adventure SF and space opera, which he collectively referred to as "center-core SF". Output: