0 (to, at, or in) that place: --
1 used to introduce the subject of a sentence, especially before the verbs be, seem, and appear: --
2 used to express sympathy or satisfaction: --
3 in, at, or to that place: --
4 used to introduce sentences, esp. before the verbs be, seem, and appear: --
There's lots of clues as to why there's three.
I don't know that there's a lot of new material here.
To sleep, perchance to learn - aye, there's the rub!
Refresh with liquid, when the sun's gone - there's an excess of wine here.
There's a lot to be said for the innocent ear.
There's a question of how much market we can afford, without destroying the social ties that make the market possible.
Our life is more fulfilling with e-mails, because there's art in them, and this paper explores that art in terms of discourse analysis.
The form there's seems a frozen option, not relevant here.