A total of 79 per cent of people questioned in a survey agreed that adults suffering incurable illness should receive 'medical help to a peaceful death'.
The majority of adults suffering incurable illnesses agree that they should receive medical help to have a peaceful death.
The statement didn't mention that people questioned in the survey were suffering incurable illnesses themselves therefore it is not possible to comment on what they thought. This means technically the statement could be true or false.  
( z1 agree :ARG0 ( z2 adult :quant ( z3 majority ) :ARG0-of ( z4 suffer :ARG1 ( z5 ill :mod ( z6 incurable ) ) ) ) :ARG1 ( z7 recommend :ARG1 ( z8 receive :ARG0 z2 :ARG1 ( z9 help :ARG0 ( z10 medicine ) :ARG1 ( z11 die :ARG1 z2 :manner ( z12 peaceful ) ) :ARG2 z2 ) :ARG2 z2 ) ) )