Complex sentence: Of the extant members of the genus "Mycteria", this bird is basal to the clade yellow-billed stork, which is itself basal to the milky stork and the painted stork.
Split into simpler sentences: Of the extant members of the genus "Mycteria", this bird is basal. The clade that it is basal to is the clade that has the yellow-billed stork being basal to the milky stork and the painted stork.