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Oh, I see.

But those clusters were clusters of people who wanted to work together, and they didn't know what was necessarily going to come out of the relationship. And in fact, friendships of an intellectual kind were formed at the Center that were very rich in the future years, and that's been proven by the books that have been written and other things that have come out of the experience at the Center.

How was a cluster formed? Just to --

Well, a cluster starts with one strong person who has an idea what he'd like to devote his year to. And then you take it from -- if you're the director and you're looking for people -- first, if the initial person said, gee, I'd like to work with somebody at Berkeley on a problem, then you find out whether that person at Berkeley is the quality of person you'd like to have at the Center.

So the clusters were actually formed in the admission--

That's right.

Before they arrived.

Yes. Oh, yes.