Task: Sentence Ordering
Input (English): Steps: (1) A mine is excavated in the side of a mountain (2) Miners enter the mine (3) Miners remove the coal from the mine (4) The coal is placed into carts or on a conveyor belt (5) The coal is moved up to the surface (6) The coal is loaded onto a truck  
Where does the following step fit into the given list of steps: The truck takes the coal to a power station. 
Output (English):  After step 6.