An IP address relates to the location of a user's computer or device, and a single person may have multiple IP addresses if they use different locations or networks. These IP addresses are grouped because the average embedding of each IP address's opening prompts (computed with all-MiniLM-L6-v2 sentence-transformer) has cosine similarity ≥ 0.75 and they share the same state (Taipei City). Groups are merged transitively—if A matches B and B matches C, all three are grouped even if A and C are below 0.75.