This presentation presents examples of data matching in practice. As a first example, it presents a case study on the effectiveness of COVID-19 vaccinations. It covers technical and privacy considerations for matching spatial data with surveys, challenges and potential applications. It also discusses how traditional data matching is changing with larger volumes of (unstructured) data (Big Data Perspective), and Language Models for data matching. This presentation is the seventh part of a set of presentations on the topic of "Tools and Workflows (Linked Data)". Presentation available after free registration: https://elearning.gesis.org/course/section.php?id=1278