37. The system of claim 28 , the instructions further causing the computer system to parse a lattice of terminals with the context free grammar to produce a packed parse forest representation in a form of an AND/OR graph representation.
37. The system of claim 28 , the instructions further causing the computer system to parse a lattice of terminals with the context free grammar to produce a packed parse forest representation in a form of an AND/OR graph representation. 38. The system of claim 37 , the instructions further configured causing the computer system to: enumerate priced tickets that include assignments of fares to flights from the AND/OR graph representation.