With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Connaught Tunnel is 5 miles and 22 feet long.
text_B: This is a comprehensive index of city-building games , sorted chronologically .. city-building games. city-building games. Information regarding date of release , developer , platform , setting and notability is provided when available .. The table can be sorted by clicking on the small boxes next to the column headings .
not_related.