Es

Pronome

  konnte

Auxiliar

 bis  heute

Adverbio

  nicht

🚫

Partícula

  sicher

Adxectivo

 eruiert  werden

Auxiliar

,  ob

Conxunción subordinante

  und

Conxunción coordinadora

  inwieweit

Adverbio

 Postel involviert  war

Auxiliar

.

To date, it has not been possible to determine for sure whether and to what extent Postel was involved.

To date, it has not been possible to determine for sure whether and to what extent Postel was involved.