doc_content = [
    "to be is to do. to do is to be",
    "to be or not to be. i am what i am",
    "i think therefore i am. do be do be do",
    "do do do, da da da. let it be, let it be."
]
doc_content = [
    "to be is to do. to do is to be",
    "to be or not to be. i am what i am",
    "i think therefore i am. do be do be do",
    "do do do, da da da. let it be, let it be."
]