{
  a: using (groupedByFirstName = in0 groupBy $.firstName) groupedByFirstName,
  b: using (groupedBySalary = in0 map $.firstName filter $.lastName == "Emiliano" groupBy $.salary) groupedBySalary,
  c: using (students = in0 map { firstName: $.firstName, lastName: $.lastName }) (students orderBy $.firstName),
  d: in0 map using (firstName = $.firstName, lastName = $.lastName) { firstName: firstName, lastName: lastName, fullName: firstName + ' ' + lastName },
  e: using (groupedByFirstName = in0 groupBy $.firstName) groupedByFirstName
}