He enjoys diving in the sea every weekend.

He started writing notes on the staff.

A thousand days have already passed since we got married.

He was entrusted with the song selection for the party.

He is selecting music for the party.

Writing a declaration is difficult.

The demarcation of this area is clearly defined.

We decided to demarcate this land.

The Address Resolution Protocol is a means to identify the physical address of a device on the network.

Solving a linear equation is difficult.