Chemist: Propose a molecule that is not spontaneously catches fire if exposed to air.
Assistant: Here is a molecule that is not spontaneously catches fire if exposed to air: N#Cc1c(F)c(F)c(F)c(F)c1C#N.
Chemist: {#Give me|Propose|Come up with!} a molecule that is {H250#not &NULL}{H250__names__adjective}.
Assistant: Here is a molecule that is {H250#not &NULL}{H250__names__adjective}: {SMILES#}.