Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- The Senate on Thursday passed its version of the health care bill, inching the country closer to the biggest expansion of medical coverage since Medicare was enacted more than four decades ago. Senate Democrats declared victory after the 60-39 party line vote, but one of the most complicated tasks is still ahead. A conference committee must reconcile the differences -- notably a public option, how to pay for the plan that emerges, and coverage for abortion -- and merge them into one. The House and Senate will then have to pass the revised plan before it can be sent to President Obama's desk. Each chamber needs a simple majority vote for final passage.Conference committee must merge House, Senate billsBills differ on public option, abortion language, fundingFinal bill will look a lot like the Senate bill, congressional scholar saysLawmakers might try to extract favors in final negotiations, Ornstein says 
 Question:The Senate plan increases the _ payroll tax on individuals earning more than $200,000 and couples earning more than $250,000 from the current 1.45 percent to 2.35 percent.

Medicare