'Someone' in the Bible

But someone came and reported to them, "Look! The men you put in prison are standing in the temple courts and teaching the people!"

Now in that city was a man named Simon, who had been practicing magic and amazing the people of Samaria, claiming to be someone great.

The man replied, "How in the world can I, unless someone guides me?" So he invited Philip to come up and sit with him.

Then the eunuch said to Philip, "Please tell me, who is the prophet saying this about -- himself or someone else?"

Look, you scoffers; be amazed and perish! For I am doing a work in your days, a work you would never believe, even if someone tells you.'"

If then Demetrius and the craftsmen who are with him have a complaint against someone, the courts are open and there are proconsuls; let them bring charges against one another there.