Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Mark the part with the error as your answer. If there is no error, mark ‘No error’ as your answer (Ignore the errors of punctuation, if any) James Robinson, who spent (1)/decades researching why(2)/ certain states and societies prosper,(3)/ he’s come to a more nuanced understanding.(4)