Dershowitz is a regular media contributor, political commentator, and legal analyst. Robert Mercer contributed $25,059,300, ranking as the 7th largest individual contributor. Longtime covering contributor Grace Dent took over the column. He subsequently joined the program as a special contributor and analyst. By 2011, Microsoft ranked as the 17th most prolific corporate contributor to the kernel. Tourism is certainly a significant contributor to the economy. Carnegie was a frequent contributor to periodicals on labor issues. He is a former contributor to MSNBC. Seder also works as a political contributor for MSNBC. He is a regular contributor to Project Syndicate. Tourism is a major contributor to the economy. The episode featured a cameo from Gyles Brandreth, a regular contributor to Dictionary Corner. He is a major contributor to Republican Party candidates. He was also a regular news contributor for the show. Obesity is another major contributor to knee pain.