καὶ ἐπηρώτων αὐτὸν λέγοντες, ὅτι λέγουσιν οἱ γραμματεῖς ὅτι Ἠλίαν δεῖ ἐλθεῖν πρῶτον.

1. καὶ
   and
2. ἐπηρώτων
   they were asking
   were asking
3. αὐτὸν
   him
4. λέγοντες
   saying
5.  
   ,
    
6. ὅτι
   that
   because
7. λέγουσιν
   they say
8. οἱ
   the
9. γραμματεῖς
   scribes
10. ὅτι
    that
    because
11. Ἠλίαν
    Elijah
12. δεῖ
    it is necessary
13. ἐλθεῖν
    to come
14. πρῶτον
    first
15.  
    .
     

And they were asking him, saying, Why do the scribes say that Elijah must come first?