| W12-2022 | designed as a component in the | Why2 tutorial dialogue system | ( VanLehn et al. , 2002 ) . Even |
| N03-2030 | qualitative physics questions inside the | Why2 tutorial dialogue system | ( VanLehn et al. , 2002 ) . In |
| W12-2022 | approach in the context of the | Why2 tutorial dialogue system | , their use of semantic classes |
