Can i say this sentence, is this sentence grammatically correct. can i add it in my essay?

the sentence is:

after 4 years, a coincidence no one ever thought would happen, happened.

Read these sentences from thr excerpt. what the most dreaded, that i most desired. what he most loved, i most hated. that which to him was a great evil, to be carefully shunned, was to me a great good, to be diligently sought; and the argument which he so warmly urged, against my learning to read, only served to inspire me with a desire and determination to learn. which statement best explains why the author uses parallel structure to advance his purpose?

Which sentence from the story best illustrates how jeannette feels about her family’s choice of vacation?

What do the excerpts have in common? both point out the tragic nature of situations in which children make journeys without their parents. both describe what immigrant children must do to survive when traveling to the united states. both explain why most children want to leave central america without their parents. both indicate the tragic problems and their consequences that children in central america must face.