In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Q: Passage: Despite this reversal, the two have managed to carve a successful television career for themselves, hosting various programmes on the BBC, most notably Saturday morning children's shows TMi and Top of the Pops Reloaded. They made their national television debut on ITV1. Sam & Mark hosted CBBC's weekday morning breakfast show, Level Up for four months from 3 April 2006 to 1 September 2006. On 16 September 2006, they hosted the first episode of TMi, a new Saturday morning TV show for the BBC on BBC Two and the CBBC Channel, alongside presenter Caroline Flack. The third series of the show ended in December 2008 and the BBC have confirmed a fourth series of the Saturday morning series for CBBC. In 2007, Sam & Mark presented a show on CBBC called Do Something Different. Beginning on 3 January 2009, Sam and Mark's Who Wants to be a Superhero? began to air where children had to compete to be a new superhero for Stan Lee. They were also asked to perform on Children in Need 2007.
Link Information: They made their national television debut on ITV1. Answer: 1922
A:
Which network was broadcasting first, the one Sam & Mark hosted Saturday morning children's shows on, or the network they made their debut on?