208. The indefinite adjective, related to the indefinite pronoun "iu",
is "ia", of any kind, some kind of, a certain kind of, expressing
indefinitely the quality of a person or thing:
Estas ia birdo sur tiu arbo,
there is a bird of some sort on that tree.
Mi vidis iajn ostojn sur la tero,
I saw some kind of bones on the ground.
Estas ia homo en tiu tendo,
there is some sort of human being in that tent.