To summarize a folding trajectory, we perform the following three steps. First, for each conformation, we identify all the frequent SOAPs that appear in it and use these SOAPs to represent this conformation. Note that not every conformation contains frequent SOAPs, especially when minSupp is set high. Second, for each SOAP-representable conformation, we carry out two tasks on its associated SOAPs. We next use the folding trajectories of BBA5 to explain how these two tasks are carried out.