As to. (It usually is not translated into English.)
It joins a dependent WH clause to the independent one.
Don’t always observe each other as to who of you will be the first (to do it or to go).
Inquire please how much that sarong is.
Bambalun ingket iyan, payamante bang sāingge taha'nen.
Unwind the rope; we will see how long it is.
That old man is always muttering, and I don’t know what is he angry at.
I don’t know in which direction my weaving is crooked.