How to make a healthy fruit smoothie<br>Put the oats and chia seeds into the blender. Grate 'em up until you get the consistency of flour--in other words, till they're near powder. Add milk and yogurt.
To make a smoothie you have to add the milk and yogurt after you grate the oats. 
There is nothing here that says you have to do this in order to make a smoothie. It's possible to add the milk and yogurt to un grated oats and still have a smoothie. The context alone doesn't make it clear the order of operation is essential to smoothie making. 
( z1 add :ARG0 ( z2 you ) :ARG1 ( z3 and :op ( z4 milk ) :op ( z5 yogurt ) ) :time ( z6 after :op ( z7 grate :ARG0 z2 :ARG1 ( z8 oat ) ) ) :purpose ( z9 make :ARG0 z2 :ARG1 ( z10 smoothie ) ) )