RebGUI table

Hello,
here my problem:
if a use a table in rebgui, I can access the block of the table with /selected refinement; but I can't acces to the single value! It's very strange to me, see this example:

Code:

print a_table/selected
==  1 $3 Mario

probe a_table/selected
==  [ 
1 $3 "Mario"
]

print type? a_table/selected
== block!

foreach item a_table/selected [ 
  print type? item ]
== integer!
== money!
== string!

a_table/selected/1
==1 $3 Mario

a_table/selected/2
==1 $3 Mario

a_table/selected/3
==1 $3 Mario

How can I access only to "Mario"?

Thanks Graham, you're always the number 1!
However, to help people, I'll write here something that it's not so obvious with table in RebGUI:
creating table

Code:

a: table options ["Column 1 heading" left .5 "Column 2 heading" left .5] data [a b c d ]

accessing data (image the second row selected)

Code:

a/selected
==  [ c d]

a/picked
== 2

adding row

Code:

a/add-row [e f ]

removing row

Code:

a/remove-row 2

modifing row

Code:

a/alter-row 2 [g h ]