The grandmother threw her granddaughter to her death because she would not stop screaming.

Who is "she" in this prior sentence?
her granddaughter
Kyle purchased three new monitors due to a recommendation by his brother, because he wanted to increase his productivity.

Who is "he" in this prior sentence?
Kyle
The Emancipation Proclamation made slavery illegal, but it did not actually cause many slaves to be freed.

Who is "it" in this prior sentence?
The Emancipation Proclamation