question: By what company have the Lisbon tram services been supplies by ?
answer: Companhia de Carris de Ferro de Lisboa ( Carris )
turker_answer: Companhia de Carris de Ferro de Lisboa ( Carris ) is the company that supplies the Lisbon tram services .
rule-based: Have the Lisbon tram services been supplies by by Companhia de Carris de Ferro de Lisboa ( Carris .