This task is about identifying the object of a given sentence. The object of a sentence is the person or thing that receives the action of the verb. It is the who or what that the subject does something to. Each sentence in this task is guaranteed to contain a single object. The input is a sentence and the output is the identified object of that sentence.

Dhaka district had a population density of 8,552.4 km2 in 2011.
8,552.4

Poaceae class is Monocotyledon.
Monocotyledon

The novel Into Battle is followed by The Violet Keystone.

The Violet Keystone