Task: Sentence Ordering
Input (English): Steps: (1) The salt water is heated (2) As the saltwater is heated the water becomes a gas (3) The salt particles sink to the bottom of the container (4) Allowed to cool (5) The salt particles are left behind in the first container (6) The second container contains fresh water.  
Where does the following step fit into the given list of steps: Gaseous water is piped into another container 
Output (English):  After step 3.