Task: Question Answering
Input (English): Question: Which of the following statements about Parkinson's disease is true? 
 Options:  <1> The disease begins with obvious manifestations that guide the doctor to formulate the definitive diagnosis. <2> The disease is a neurological disorder characterized by tremor, rigidity and bradykinesia. <3> In the beginning, patients walk more and more slowly. <4> Flaccidity, associated with motor dysfunction, is bilateral. <5> In advanced stages, the patient presents lordosis.
Output (English): 2