"Lion" Frank Thelen goes to a high school in Königswinter for the unusual mission. As an entrepreneur and startup investor, who never liked going to school when he was young, he brings
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"Lion" Frank Thelen goes to a high school in Königswinter for the unusual mission. As an entrepreneur and startup investor, who never liked going to school when he was young, he brings all of his experience to prepare students for the challenges of the future.
