Explain the pun: i usually take steps to avoid elevators

in "letter from a birmingham jail," king argues that there are four basic steps in any nonviolent campaign: "[c]ollection of the facts to determine whether injustices exist; negotiation; self purification; and direct action." finally, direct action is taken and acts such as boycotts and sit-ins are staged.

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.