Individual Professional Visibility in Grounded LLM Answers: 2,400 Buyer-Intent Responses Across Four European Markets

Grounded responses from four large language models to buyer-intent questions of the form "who is the best real estate agent in [city]", covering real estate agents, car dealership sales representatives and insurance brokers in Poland, Ireland, the Netherlands, Lithuania and Estonia. 2,400 responses from GPT-5.6 Sol, Gemini 3.6 Flash, Perplexity Sonar Pro and Grok 4.5, over 120 prompts with five-iteration replication, in English and in the local language for three of four markets. Collected 24 July 2026, 21:07 to 23:19 UTC, with live web-search grounding. 20,580 citations are classified into 20 source categories on a second axis of controllability. The dataset carries aggregate and response-level records only. No individual is named. The identifying roster of professionals is not included and is retained in an access-controlled file, as described in DATASHEET.md and in the data protection notice at https://open.rankfor.ai/resources/research-data-protection-notice