Rip Off<br>Sarah was at the market. And she wanted to buy cabbage juice. And she saw a 16 ounce bottle for $6. She knew it was just cabbage and water. So she decided to buy her own juicer instead.
The price of cabbage is a concern.
"Of concern" is a relative comment and may not relate to Sarah. 
( z1 concern :ARG0 ( z2 thing :ARG2-of ( z3 price :ARG1 ( z4 cabbage ) ) ) )