"128_dim_word_vector" is the word vector that is used in 2.2.1.  "86 keywords"  is used to extract directive sentences in section 3.1.1. "constructed_KG and source_of_data" contains the constructed API-Task KG and source of data used in constructed KG. ”Experiment RQ_1 and RQ_2" is the experiment data. "Empirical_study" contains the Stack Overflow questions that are used in the empirical study.