The 2017 Congolese police decapitation attacks occurred on 23 March 2017 in the DR Congo. About 40 police officers were ambushed then decapitated. Six police officers were released. All of the surviving police spoke the Tshiluba language. The Kamwina Nsapu terrorist group attacked the police convoy.
The Kamwina Nsapu group spoke the Tshiluba language.
Can we draw the following hypothesis from the context? 

Context:

The 2017 Congolese police decapitation attacks occurred on 23 March 2017 in the DR Congo. About 40 police officers were ambushed then decapitated. Six police officers were released. All of the surviving police spoke the Tshiluba language. The Kamwina Nsapu terrorist group attacked the police convoy.

Hypothesis: The Kamwina Nsapu group spoke the Tshiluba language.n
Options: 

 - yes

 - it is not possible to tell

 - no
it is not possible to tell
Can we draw the following hypothesis from the context? 

Context:

The 2017 Congolese police decapitation attacks occurred on 23 March 2017 in the DR Congo. About 40 police officers were ambushed then decapitated. Six police officers were released. All of the surviving police spoke the Tshiluba language. The Kamwina Nsapu terrorist group attacked the police convoy.

Hypothesis: The Kamwina Nsapu group spoke the Tshiluba language.n
Options: 

 - yes

 - it is not possible to tell

 - no
user
it is not possible to tell
assistant