In the 1990s Strathclyde Police used pink in cells(牢房) based on research carried out by the U.S.Navy.
问题描述：
In the 1990s Strathclyde Police used pink in cells(牢房) based on research carried out by the U.S.Navy.
based on research做状语,不是应该是主语发出的动作么,也就是Police was based on research.但是这样不通啊
可是它是谁的定语呢？
答
based on research做pink的定语 ,carried out by the U.S. Navy做reseach定语.主谓是Police used pink in cells.