from typing import List


def get_corpus(documents: List[List[str]]) -> List[str]:
    """Get a list of all of the words in each document (includes duplicates).

    Args:
        documents (List[List[str]]): List where each element is a list of tokens in a given document.

    Returns:
        List[str]: List of all of the tokens appearing in each document,

    """
    return [word for document in documents for word in document]