When is the abbreviation “n. p.” used in a bibliography entry?

In a speech to high school students, a business owner makes the following statement short response

Ineed with another opening line. here's the idea: a girl got detention for something she didn't do, and had to stay afterschool until evening. she headed towards the bathroom, only to be lured away by distant music. she walks down the dark hallway (which lead to the auditorium) and saw a boy playing the piano, perfectly. i just need a detailed description of this. best will be awarded brainliest. you

Realism was a fairly influential and widespread literary movement in the united states in the latter half of the nineteenth century. which american writer is among the pioneers of american realism? a. ernest hemingway b. f. scott fitzgerald c. j. d. salinger d. mark twain