我有一个包含csf_id和反馈的数据集
256 134 not taking regular classes. 1 Very Negative
187 134 the subject knowledge of sir is excellent. 5 Very Positive
217 43 not able to properly clear the doubts of the ... 1 Very Negative
202 44 he has trimendous knowledge of subject and he... 5 Very Positive
216 49 not able to express his knowledge and partial... 1 Very Negative
69 135 She needs to get more prepared with better te... 5 Very Positive
14 138 good way of teaching with giving practical ex... 5 Very Positive
如何对数据进行分组，以使与特定csf_id对应的所有反馈（无论是正反馈还是负反馈）都出现在同一列中？