What is the name and opening year for the branch that registered the most members in 2016?
return branches ;return members registered of #1 ;return #2 in 2016 ;return number of  #3 for each #1 ;return #1 where #4 is  highest ;return name of #5 ;return opening year of #5 ;return #6 ,  #7
['select', 'project', 'filter', 'group', 'superlative', 'project', 'project', 'union']