Chart-Based Surface Realisation Given an FB-LTAG G of the type described above, sentences can be generated from semantic formulae by (i) selecting all trees in G whose semantics subsumes part of the input formula and (ii) combining these trees using the FB-LTAG combining operations namely substitution and adjunction.
for instance, in Figure 2, given the semantics l1:named(j john), lv:run(a,j), lv:often(a), the three trees shown are selected.