With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Generation X features birth years from the 1950s .
text_B: There are no precise dates for when this cohort starts or ends ; demographers and researchers typically use starting birth years ranging from the early-to-mid 1960s and ending birth years ranging from the late 1970s to early 1980s .
REFUTES.