Question: Write a Prolog program with the following knowledge base: directTrain(union-station, san-bernardino). directTrain(oxnard, union-station). directTrain(burbank, lancaster). directTrain(lancaster, union-station). directTrain(san-bernardino, riverside). directTrain(santa-ana, burbank). directTrain(oceanside, santa-ana). This knowledge

Write a Prolog program with the following knowledge base:

directTrain(union-station, san-bernardino). directTrain(oxnard, union-station). directTrain(burbank, lancaster). directTrain(lancaster, union-station). directTrain(san-bernardino, riverside). directTrain(santa-ana, burbank). directTrain(oceanside, santa-ana).

This knowledge base holds facts about towns you can travel between by taking a direct train, e.g., from union station to san bernardino.

Extend your Prolog program with a rule that adds a directTrain between A and B whenever there is one from B to A.

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