added rule to handle _that
added rule to handle _that

rodsol/relex,williampma/relex,leungmanhin/relex,linas/relex,virneo/relex,AmeBel/relex,linas/relex,williampma/relex,virneo/relex,AmeBel/relex,AmeBel/relex,ainishdave/relex,williampma/relex,virneo/relex,opencog/relex,opencog/relex,ainishdave/relex,rodsol/relex,anitzkin/relex,rodsol/relex,anitzkin/relex,linas/relex,leungmanhin/relex,ainishdave/relex,anitzkin/relex,ainishdave/relex,anitzkin/relex,williampma/relex,rodsol/relex,anitzkin/relex,leungmanhin/relex,opencog/relex,virneo/relex