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Logtalk - Object oriented extension to Prolog
Release 2.9.1
Copyright (c) 1998-2001 Paulo Moura. All Rights Reserved.
% plan a trip from london to the aiai conference in edinburgh:
| ?- plan(london)::from(imperial, aiai, L).
L = [[taxi(imperial,lhr)]-[fly(lhr,edin)]-[taxi(edin,aiai)]] ?
yes