code: def evaluate(values):
      """Linear model (#1) used in Li et al., (2010).
  
          y = x1 + x2 + x3 + x4 + x5
  
      Parameters
      ----------
      values : np.array
  
  
      References
      ----------
      .. [1] Genyuan Li, H. Rabitz, P.E. Yelvington, O.O. Oluwole, F. Bacon,
              C.E. Kolb, and J. Schoendorf, "Global Sensitivity Analysis for
              Systems with Independent and/or Correlated Inputs", Journal of
              Physical Chemistry A, Vol. 114 (19), pp. 6022 - 6032, 2010,
              https://doi.org/10.1021/jp9096919
      """
  
      Y = np.zeros([values.shape[0]])
      Y = np.sum(values, axis=1)
  
      return Y
  
label_desc: Use image node_id 1 for calling a global function with example usage: evaluate(values) and returns: Y