Read through the sentences below, and decide which ones contain defining, and which ones
non-defining relative clauses.



1.  The scientists who the Americans hired were originally from Germany.


2.  The stethoscope which René Laennec invented in 1816 is used for listening to the body’s
internal sounds.


3.  A great deal has been written about the naturalist Jay Adamson who famously raised a lion’s cub
herself.



4.  The methods which we use to learn languages vary from country to country.


5.  They have two children who play the violin.