Generate a question about the following movie plot: Renowned violinist Holger Brandt (Leslie Howard) finishes the final concert of his tour to ardent applause. He informs the fervid New York audience that this was the last performance of his accompanist, friend and mentor, Thomas Stenborg (John Halliday), who will now retire from touring. Holger himself will embark upon another tour after a few months' rest. He is in search of a new accompanist.Holger and Thomas return to Stockholm, where they are fondly welcomed by their respective spouses. Holger's wife, Margit (Edna Best), has been bringing up their two children, Eric (Douglas Scott) and Ann-Marie (Ann E. Todd), on her own for the past few years. Eric is now a teenager, while Ann-Marie is six. Ann-Marie has become a gifted pianist in Holger's absence under the tutelage of Miss Anita Hoffman (Ingrid Bergman), a young musician of exceptional promise. Anita is Thomas's prized pupil and is studying towards the prestigious Jenny Lind scholarship offered by a music academy in Paris.Holger is at first uninterested in Anita. However, he is forced to notice her when she plays the piano brilliantly at Ann-Marie's birthday party. Holger joins her on his violin and is stunned by their electrifying synchrony. He offers her to be his accompanist on tour but she declines, citing her need to study for the scholarship.Holger and Anita gradually fall in love. Initially, Anita feels guilty about the affair and attempts to break off her relationship with Holger by leaving Stockholm. However, Holger confesses his true feelings about Anita to Margit. This results in a separation which leaves him free to commence the next tour with Anita as his accompanist.Holger and Anita perform together to immense acclaim. At the end of the tour, they go on vacation to a picturesque seaside town in France. Anita receives a letter from her former mentor, Thomas, informing her that she has won the Jenny Lind scholarship. However, she burns the letter rather than allow her career to stand in the way of her relationship with Holger. Holger is...
A:
What is Ann Marie injured by when Holger visits her at school?