Is it common knowledge, or must it be documented? Choose common knowledge or needs documentation on the line before each example. Russia became a communist country in 1917. In To Kill a Mockingbird the author intends the children’s snowman to be a symbol. Pablo Picasso painted abstracts. U. S. presidential elections take place every four years. “Ask not what your country can do for you; ask what you can do for your country.” an analysis of the use of color in a Da Vinci painting