### Instruction:  "statement 1": When the river is running at 2 km / h , it takes the rower 1 hour to row to Big Rock and back, "statement 2" :When the river is running at less than 4 km / h , it takes the rower 1 hour to row to Big Rock and back, "options: " Entailment or contradiction or neutral? Let's write a program.### Response: River_running_s1 = 2
River_running_s2 = 4

if River_running_s1 is None or River_running_s2 is None:
   print('neutral')

elif River_running_s1 <= River_running_s2:
   print('Entailment')

elif River_running_s1 != River_running_s2:
  print('contradiction')