The student is quoting from pages 26-27 of the following source:

Follman, Mark. “Trigger Warnings.” Mother Jones, Nov./Dec. 2015, pp. 22-29.

Mass shootings in America took a turn with Columbine; Follman argues that the teen shooters “authored a compelling new script at the dawn of the Internet age” (26-27).

Mass shootings in America took a turn with Columbine; Follman argues that the teen shooters “authored a compelling new script at the dawn of the Internet age” (pp. 26-27).

MLA does not use the abbreviation "pp." in in-text citations.