def METHOD_NAME(io):
    sheets = {
        "Talks": {
            "usecols": "A:I,K",
            "parse_dates": [5, 6],
        },
        "Rooms": {
            "usecols": "A:C",
        },
        "Speakers": {
            "usecols": "A:D",
        },
        "Tracks": {
            "usecols": "A:C",
        },
    }
    return {
        title: pandas.read_excel(
            io, sheet_name=title, header=0, engine="xlrd", **config
        )
        for title, config in sheets.items()
    }