raiseException('Cannot evaluate string (remember, for safety reasons only literal structures can be evaluated: strings, numbers, tuples, lists, dicts, booleans, and None)')
#ids = a.query('("t-lymphocytes"[MeSH Terms] OR "t-lymphocytes"[All Fields] OR "t cell"[All Fields] OR "t-cell"[All Fields]) OR ("leukaemia"[All Fields] OR "leukemia"[MeSH Terms] OR "leukemia"[All Fields])',