With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Before 1998 , CSIRO obtained patents for a method later used to `` unsmear '' signals in Wi-Fi .
text_B: This was updated in 1999 with 802.11b to permit 11 Mbit/s link speeds , and this proved to be popular .
NOT ENOUGH INFO.