He sent about 2.2 billion spam emails over a period of around one and a half years.

a heaven-sent rain saved the crops

The court sentenced him to death.

She is a girl full of sentiment.

the main (or independent) clause in a complex sentence has at least a subject and a verb

too often the significant episode deteriorates into sententious conversation- Kathleen Barnes

the living knew themselves just sentient puppets on God's stage- T.E.Lawrence

As the popping sound of the fireworks stopped, it suddenly became quiet around me. The smell of gunpowder somehow put me in a sentimental mood.