On Markus Lanthaler's personal website, find his primary area of professional expertise. Also, locate the URL for his most relevant online platform where he shares his technical code and projects. State both the area of expertise and the platform's URL.
Navigate to me.markus-lanthaler.com. Scroll down to the 'About Me' section to identify his primary professional focus. Continue scrolling to the 'Online Presence' section. Identify 'GitHub' as the most relevant platform for his code and extract its URL. State his primary professional focus and the GitHub URL.
State that Markus Lanthaler's primary professional focus is 'Semantic Web technologies, Linked Data, and Web APIs'. Identify 'GitHub' as the most appropriate platform for viewing his technical work or code. Provide the exact URL for his GitHub profile: 'https://github.com/markuslanthaler'.