With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Armadillo World Headquarters was a literature venue.
text_B: Canada 's contemporary theatre reflects a rich diversity of regional and cultural identities .. Since the late 1960s , there has been a concerted effort to develop the voice of the ` Canadian playwright ' , which is reflected in the nationally focused programming of many of the country 's theatres .. Within this ` Canadian voice ' are a plurality of perspectives - that of the First Nations , new immigrants , French Canadians , sexual minorities , etc. - and a multitude of theatre companies have been created to specifically service and support these voices .
not_related.