If the mid-points of the sides of a triangle $\mathrm{AB} ; \mathrm{BC} ; \mathrm{CA}$ are $\mathrm{D}(1,2,-3), \mathrm{E}(3,0,1)$ and $\mathrm{F}(-1,1,-4)$, then the centriod of the triangle $A B C$ is