The 'request' group
These nouns refer to requests. When the to-infinitive is active, in most cases someone is asking someone else to do something. However, in the case of application, and sometimes demand and request, someone is asking to be allowed to do something themselves.
appeal application call clamour command demand entreaty injunction instruction invitation message order plea pressure request warning
Shots were heard after Jones ignored appeals to surrender.
The 22-year-old's demand to be allowed to leave will now be put before the club's board of directors.
Shortly after, I took up his invitation to visit him in his study at the museum.
The couple were stunned when their request to adopt a child was approved.
In the case of appeal, injunction, invitation, and warning, the noun is sometimes followed by a prepositional phrase beginning with to and a to-infinitive clause. This pattern is N to n to-inf.
Her father gave a moving warning to other parents to be aware of what their children were up to.