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

Groups everything between itself and a following KEhE for purposes of logical
connection, tanru construction, or other purposes. KE and KEhE are not used for
mathematical (see VEI and VEhO) or discursive (see TO and TOI) purposes.

ta ke melbi cmalu ke'e nixli ckule That is-a-( pretty little ) girl school.
That is a school for girls who are pretty in their littleness.

