Interjections have the POS-tag ITJ
:
(IP-MAT-SPE (ITJ Ach) ← interjection (NP-VOC (ADJA wise) (ADJA junge) (NA man)) ... )
Note: Unlike the standard Penn scheme, we do not make use of INTJP
for cases of multi-word interjections. These just attach directly at clause-level:
(IP-MAT-SPE (ITJ jach) (ITJ Jach) (NP-SBJ (NA Ot)) ... )