One question used the source key-value pair selection, while the final use case proposed the composition of three different datasets to prepare a realistic data analysis scenario (e.g. ‘Suppose you need to identify DNA promotorial regions bound by the MYC transcription factor that present somatic mutations (if any) in breast cancer patients...’), which involved selecting items in separate search sessions from three different data sources. The gene discussed is MYC; the disease is breast carcinoma.