With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: A complex railway system was part of Pompeii .
text_B: The population of Pompeii , 160 years after its destruction was estimated to be 11,000 people and the city had an amphitheater , gymnasium , port , and a complex railway system .
SUPPORTS.