With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Egypt is officially the Arab Republic of Egypt.
text_B: MERGE WITH Fault-tolerant software. Fault-tolerant software. Fault-tolerant software. Software fault tolerance is the ability of computer software to continue its normal operation despite the presence of system or hardware faults .. computer software. computer software. hardware. Computer hardware
not_related.