W-representations carried by the wcells in Spin(7) x PSp(6,R) block of Spin7

wcell#0:
  cardinality : 1
  special orbit : [1, 1, 1, 1, 1, 1, 1]
  special representation : [[], [1, 1, 1]]
  cell representation : phi[[],[1, 1, 1]]