What does it mean by kennedy "improvised remarks "?

Explanation:

Improvise is like to give a speech without practicing your own speech, and remarks mean to mention or regard with attention. So as a example of  " Kennedy's improvised remarks" is when he made a statement of MLK's assassination at Indianapolis, Indiana, April 4, 1968  

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.

b. they tried to evict the squatters from the area.

so sorry if wrong