Did Caffeine subject has role stimulant and PDE3 inhibitor ?
ASK WHERE { wd:Q60235 wdt:P2868 wd:Q211036 . wd:Q60235 wdt:P2868 wd:Q2043933 }
caffeine: Q60235 stimulant: Q211036 caffeine: Q60235 pde3 inhibitor: Q2043933