1. they - Pronoun
3. they - Determiner
The plural of he, she, or it. They is never used adjectively, but always as a pronoun proper, and sometimes refers to persons without an antecedent expressed.
Source: Webster's dictionaryA wise person is not bored in their solitude; they are bored in a crowd of fools. Source: Internet
We must love everyone regardless of whether or not they love us; that is their business. Ephraim of Arizona
The saints aren't made from other material, they're humans just like us. In this they differ: they took seriously the question of their salvation. Seraphim of Sarov
The madman and the rich do whatever they want. Turkish Proverb
In the planting season visitors come singly, and in harvest time they come in crowds. Australian Proverb
Listen to what they say about others, and you will know what they say about you. Cuban Proverb