Input (grade 12): Sir Karl Raimund Popper, CH FRS FBA (28 July 1902 â "17 September 1994) was an Austro-British philosopher and a professor at the London School of Economics.
Output (grade 12): Sir Karl Raimund Popper (28 July 1902 â "17 September 1994) was an Austrian and British philosopher and a professor at the London School of Economics.