Input (grade 8): Montero performed John Williams' "Air and Simple Gifts" with Itzhak Perlman, Yo-Yo Ma, and Anthony McGill at the inauguration of U.S. president Barack Obama on January 20, 2009.
Output (grade 12): Gabriela played at Barack Obama's presidential inauguration on 20 January 2009 together with the cellist Yo-Yo Ma, the violinist Itzhak Perlman, and clarinetist Anthony McGill. Together they performed "Air and Simple Gifts," a new arrangement by John Williams based on the Shaker hymn Simple Gifts.