In the two other repetitions, initial performance was lower, and in one case the method was not able to improve performance due to poor initial data. Different randomly chosen initial data caused different queries and hence also different performance. According to the chemist, the molecules shown in the first (experiment #1: green) experiment were easier to evaluate because there were more active molecules than in the ones shown in the latter two repetitions (experiment #2: orange and experiment #3: blue). The queries are selected using Thompson sampling.