code: def measure(n):
      """Measurement model, return two coupled measurements."""
      m1 = np.random.normal(size=n)
      m2 = np.random.normal(scale=0.5, size=n)
      return m1 + m2, m1 - m2
  
label_desc: Use image node_id 1 for calling a global function with example usage: measure(n) and returns: unknown,  unknown