In the context of the input sentence, determine the relationship between 'was' and 'HarperCollins'.
Options: chief executive officer, founded by, owner of, publisher

At book publishing, HarperCollins had a strong quarter with revenues down only 3% to $407 million and segment EBITDA up 9% to $47 million despite significant bricks-and-mortar store closures, which was a far better performance than we had anticipated.
publisher