Complex sentence: Swartz was involved in the development of the web feed format RSS, the organization Creative Commons, the website framework web.py and the social news site, Reddit, in which he became an equal partner after its merger with his company, Infogami.
Split into simpler sentences: Swartz was involved in the development of the web feed format RSS, the organization Creative Commons, the website framework web.py and the social news site Reddit. He became an equal partner in Reddit after its merger with his company, Infogami.