With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Boeing 707 is a three-engine jet airliner.
text_B: The tuberosity of the tibia or tibial tuberosity or tibial tubercle is a large oblong elevation on the proximal , anterior aspect of the tibia , just below where the anterior surfaces of the lateral and medial tibial condyles end .. tibia. tibia. lateral. lateral condyle of tibia. medial tibial condyles. medial condyle of tibia
not_related.