Fish oil is rich in omega-3 fatty acids.

The truth serum was used during the interrogation.

He used a crafty tactic to win the game.

He is as stubborn as a pigheaded person.

The letter of credit was sent to the bank to confirm the transaction.

I wrote a letter of recommendation for my former colleague.

The declaration of war was a crucial moment in the country's history.

The Jerusalem Talmud is a collection of Jewish religious texts.

The Babylonian Talmud is a collection of religious and legal texts of Judaism.

The applause came from all sides.