The pigment in the flowers is a natural indicator chemical, similar to the chemical that causes litmus paper to change color in acidic or alkaline solutions.
(The pigment in the flowers; is; a natural indicator chemical, similar to the chemical) (the chemical; causes; litmus paper to change color in acidic or alkaline solutions) Context(the chemical causes,List([71, 95))):(litmus paper; to change; color; L:in acidic or alkaline solutions)
the chemical causes,List([71, 95))
The pigment in the flowers the chemical litmus paper
is causes to change
a natural indicator chemical, similar to the chemical
litmus paper to change color in acidic or alkaline solutions
color L:in acidic or alkaline solutions