sentences:  Typically, Nielsen's music might end in a different key from that of its commencement, sometimes as the outcome of a struggle as in his symphonies.There is debate as to how much such elements owe to his folk music activities.Some critics have referred to his rhythms, his use of acciaccaturas or appoggiaturas, or his frequent use of a flattened seventh and minor third in his works, as being typically Danish.