The 'burden of proof' is on the plaintiff, since the defendant is presumed innocent until proven guilty. [=the plaintiff must prove that the defendant is guilty]
The 'tax burden' has been falling increasingly on the middle class. [=middle class people have been paying a greater portion of taxes]
For the rest of his life he 'was burdened' with the knowledge that he had done nothing to help them.
(..) in eastern Siberia. This will then enable a return to a more stable oil market, as well as a stable global economy. Now, in order to make this plan viable - and mitigate any tax burden... ...to the American and Chinese taxpayers, the corporations will provide the bulk of the investment, (..)2016 TvShow: House of Cards Title: Chapter 45 Season: 4 Episode 6