'Someone' in the Bible

Or how can someone enter into the house of a strong [man] and steal his property, unless he first ties up the strong [man]? And then he can thoroughly plunder his house.

And someone told him, "Behold, your mother and your brothers are standing there outside desiring to speak to you."

And [when] he began to settle [them], someone was brought to him who owed ten thousand talents.

And behold, someone came up to him [and] said, "Teacher, what good [thing] must I do so that I will have eternal life?"

saying, "Teacher, Moses said if someone dies without having children, his brother is to marry his wife and {father} descendants for his brother.