>>> from p2 import temperature

>>> lt1 = [['AX1', 43, 67], ['AX2', 56, 45], ['BT3', 62, 89], ['GH5', 59, 74]]
>>> (a, b) = temperature(lt1)
>>> (round(a, 1), b)
(55.0, 'BT3')

>>> lt2 = [['AX1', 44, 67], ['AX2', 51, 45], ['BT3', 62, 89], ['GH5', 56, 74], ['TR5', 54, 55]]
>>> (a, b) = temperature(lt2)
>>> (round(a, 1), b)
(53.4, 'BT3')

>>> lt3 = [['BX1', 48, 67], ['HX2', 44, 45], ['BX3', 43, 89], ['BH5', 45, 74], ['BR5', 43, 55]]
>>> (a, b) = temperature(lt3)
>>> (round(a, 1), b)
(44.6, 'BX1')