I am getting the last letter of the word and not getting last column when trying to count number of each type in a dataset

Question

dataset = [
    [\'Rainy\', \'Windy\', \'Cold\', \'No\'],
    [\'Rainy\', \'Windless\', \'Warm\', \'Yes\'],
    [\'Rainy\', \'Windless\', \'Cold\', \'No\'],
    [\'Sunny