Found:

Left Branch Condition

SYNTAX: one of the constraints on extraction formulated by Ross (1967) (see island), which says that no Noun Phrase on the left branch of another Noun Phrase may be extracted from that Noun Phrase. EXAMPLE: in a structure like (i) the NP on the left branch cannot be extracted, witness *whose did you like book.

(i)     	NP
               /  \
	      NP   N'
             /      \
	  whose	    book