With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Tanzania 's population communicates mainly through the Swahili language .
text_B: Sign language - the only language used in the country - is used in parliamentary debate , in the lower courts , and as a medium of instruction in primary school ; and in foreign trade , in diplomacy , in higher courts , and as a medium of instruction in secondary and higher education .
REFUTES.