The task of estimating the consequences of the structural constraints imposed by a particular syntax-based formalism consists in finding what is often called "empirical lower bounds" on the coverage of the formalism <cite>(Wellington et al., 2006</cite>; Søgaard and Kuhn, 2009 ). Gold standard alignments are constructed and queried in some way as to identify complex alignment configurations, or they are parsed by an all-accepting grammar such that a parse failure indicates that no alignment could be induced by the formalism.