With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: International Relations includes ecological sustainability.
text_B: International relations -LRB- IR -RRB- or international affairs , depending on academic institution , is either a field of political science , an interdisciplinary academic field similar to global studies , or an entirely independent academic discipline in which students take a variety of internationally focused courses in social science and humanities disciplines .. political science. political science. interdisciplinary. interdisciplinarity. global studies. global studies. discipline. Discipline ( academia ). social science. social science. humanities. humanities. academic. academic. In both cases , the field studies relationships between political entities -LRB- polities -RRB- such as states , sovereign states , empires , inter-governmental organizations -LRB- IGOs -RRB- , international non-governmental organizations -LRB- INs -RRB- , non-governmental organizations -LRB- NGOs -RRB- , and multinational corporations -LRB- MNCs -RRB- , and the wider world-systems produced by this interaction .. polities. polity. states. state ( polity ). inter-governmental organizations. international organization. International relations is an academic and a public policy field , and so can be positive and normative , because it analyzes and formulates the foreign policy of a given State .. academic. academic. public policy. public policy. positive. Positive statement. normative. Normative statement. foreign policy. foreign policy. As political activity , international relations dates from the time of the Greek historian Thucydides -LRB- c. 460 -- 395 BC -RRB- , and , in the early 20th century , became a discrete academic field -LRB- No. 5901 in the 4-digit UNESCO Nomenclature -RRB- within political science .. political science. political science. academic. academic. Thucydides. Thucydides. 4-digit UNESCO Nomenclature. 4-digit UNESCO Nomenclature. In practice International Relations and International Affairs forms a separate academic program or field from Political Science , and the courses taught therein are highly interdisciplinary .. interdisciplinary. interdisciplinarity. academic. academic. For example , international relations draws from the fields of  : technology and engineering , economics , communication studies , history , international law , demography , philosophy , geography , social work , sociology , anthropology , criminology , psychology , gender studies , cultural studies , culturology , and diplomacy .. technology. technology. engineering. engineering. economics. economics. communication studies. communication studies. history. history. international law. international law. demography. demography. philosophy. philosophy. geography. area studies. social work. social work. sociology. sociology. anthropology. anthropology. criminology. criminology. psychology. psychology. gender studies. gender studies. cultural studies. cultural studies. culturology. culturology. diplomacy. diplomacy. The scope of international relations comprehends globalization , diplomatic relations , state sovereignty , international security , ecological sustainability , nuclear proliferation , nationalism , economic development , global finance , as well as terrorism and organized crime , human security , foreign interventionism , and human rights , as well , as , more recently , comparative religion .. globalization. globalization. diplomatic relations. diplomatic relations. state sovereignty. Sovereign state. international security. international security. ecological. ecological. sustainability. sustainability. nuclear proliferation. nuclear proliferation. nationalism. nationalism. economic development. economic development. global finance. global finance. terrorism. terrorism. organized crime. organized crime. human security. human security. foreign interventionism. foreign interventionism. human rights. human rights. comparative religion. comparative religion
related.