BE (http://www.lojban.org/en/publications/reference_grammar/chapter5.html)

Attaches sumti which fill the place structure of a single unit making up a tanru.
Unless otherwise indicated, the sumti fill the x2, x3, and successive places in
that order. BE is most useful in descriptions formed with LE. See BEI, BEhO.

mi klama be ta troci I am-a-(goer to-that) type-of-trier. I try to go to that
place.

