Figure 1: Our interactive coding system enables a crowd of non-experts to code semi-structured qualitative data. (1) First, the workers code the primary topics of all interview answers. (2) Then, the workers code each interview answer with the respective specific codes in separate tasks for each primary topic. (3) Finally, the workers' most mentioned code is set as final label. The agreement among workers indicates the crowds' consistency and the agreement between the workers' and experts' final label shows the accuracy of the crowd.