# An evil and adulterous generation seeks for a sign ... given to it

Alternate translation: "You are an evil and adulterous generation who demands signs from me ... given to you" 

# An evil and adulterous generation

Alternate translation: "An unfaithful generation" or "A godless generation" 

# the sign of Jonah

"what happened to Jonah" or "the miracle that God did for Jonah."