A helicopter and a small plane are in the air.
All aircraft around the world has been grounded due to a volcanic eruption.
Is the premise "A helicopter and a small plane are in the air." true if "All aircraft around the world has been grounded due to a volcanic eruption."?

Options: 

 - yes

 - it is not possible to tell

 - no
no
Is the premise "A helicopter and a small plane are in the air." true if "All aircraft around the world has been grounded due to a volcanic eruption."?

Options: 

 - yes

 - it is not possible to tell

 - no
user
no
assistant