Task: Question Answering
Input (English): Question: Which of the following structures are in direct contact with the oval window on each of its sides? 
 Options:  <1> The eardrum and the tympanic scale. <2> The stirrup and tympanic scale. <3> The hammer and the vestibular scale <4> The anvil and the tympanic scale. <5> The abutment and the vestibular scale.
Output (English): 5