The guard was carrying a gun, if one of the prisoners would try to escape. (Rewrite using:in case)

The guard was carrying a gun, in case one of the prisoners would try to escape.

hope it helps

The guard was carrying a gun just in case if one of the prisoners would try to escape.

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

people like to have money.

i am tired.

it is getting late.

there is no paragraph seven here.