Author: Annelen Brunner Adapted to PrologPipe by Jan-Ole Esleben 2004
NOTE: This module uses prologpipe.py for the communication between the Python backend and the Prolog grammar. It can theoretically be used instead of PrologGrammarWithPyswipl, which uses the c-bridge pyswipl, but the program will become extremely slow then. It might be a good option once prologpipe has been improved.