With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Spencer Tracy was a film actor.
text_B: Ko Pha Ngan -LRB- or Koh Phangan , เกาะพะงน , , -LSB- kɔʔ pʰa.ŋan -RSB- -RRB- is an island in the Gulf of Thailand in southeast Thailand in Surat Thani Province .. Province. Provinces of Thailand. island. island. Gulf of Thailand. Gulf of Thailand. Thailand. Thailand. Surat Thani Province. Surat Thani Province. It is part of the Samui Archipelago .. Samui Archipelago. Mu Ko Samui. It is famous for its Full Moon Party at Haad Rin Beach and as a backpacker destination .. Full Moon Party. Full Moon Party. Haad Rin Beach. Haad Rin. backpacker. backpacking ( urban ). Ko Pha Ngan has two sister islands  : the larger Ko Samui to the south and the smaller Ko Tao to the north .. Ko Samui. Ko Samui. Ko Tao. Ko Tao. Estimated perimeter  : 40 km -LRB- estimate -- 10 hr average walking time -RRB-. From mainland  : about 55 km. From Ko Samui  : about 15 km. Ko Samui. Ko Samui. From Ko Tao  : about 35 km. Ko Tao. Ko Tao. Main town  : Thong Sala. Thong Sala. Thong Sala. Highest Point  : Khao Ra , 630 m
not_related.