With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Macbeth was probably first performed in 1806 .
text_B: Macbeth -LRB- -LSB- məkˈbɛθ -RSB- full title The Tragedy of Macbeth -RRB- is a tragedy by William Shakespeare ; it is thought to have been first performed in 1606 .
REFUTES.