[CM] query on references within Loop

[Rick Taube]

arrg! and for my final magic trick here it is without typos..

define variable a-ref = {a1  {1 2 3} a2},
                 b-ref = {b1  {4 5 6} b2},
                 c-ref = {c1  {7 8 9} c2},
                 ref-list = list(a-ref, b-ref, c-ref)

print #a[list for refx in ref-list collect second(refx)]