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