def column_to_list(data, index):
    """Return a list with values of a specific column from another list

    Args:
      data: The list from where the data will be extracted
      index: The index of the column to extract the values
    Returns:
      List with values of a specific column
    """
    column_list = []
    # Tip: You can use a for to iterate over the samples, get the feature by index and append into a list
    for sample in data:
        column_list.append(sample[index])
    return column_list