... reXexive relation.basic properties of trees 29(35b) and (35c). However, only (35b) can be put in the subject positionof the passive ( 36a, b):( 35) (a) The current swept away the little brown ... quickly review the parts of the tree and related deWnitionssimply to ensure a common starting point for the discussion of treegeometrics. Take the tree in (1):1 Pullum and Scholz (20 05) present arguments ... and non-terminals: (5) (a) Root node: The node that dominates ever ything, but is dom-inated by nothing except itself.44 The ‘‘except itself’’ and ‘‘other than itself’’ parts of these deWnitions...