( ( In ( the retina ) ) ( , ( ( sensory cells ) ( ( called ( ( ( rods and ) cones ) ( ( change ( ( the photons ) ( of light ) ) ) ( into ( ( ( electrical signals ) , ) ( which ( ( are then ) ( ( ( transmitted to ) and ) ( interpreted ( by ( the brain ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (NN retina))) (, ,) (NP (JJ sensory) (NNS cells)) (VP (VBD called) (SBAR (S (NP (NNS rods) (CC and) (NNS cones)) (VP (VBP change) (NP (NP (DT the) (NNS photons)) (PP (IN of) (NP (NN light)))) (PP (IN into) (NP (NP (JJ electrical) (NNS signals)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADVP (RB then)) (VP (VP (VBN transmitted) (S (VP (TO to)))) (CC and) (VP (VBN interpreted) (PP (IN by) (NP (DT the) (NN brain)))))))))))))) (. .)))
In the retina, sensory cells called rods and cones change the photons of light into electrical signals, which are then transmitted to and interpreted by the brain.
(ROOT (S (NP (NP (DT The) (JJ light-sensing) (NNS cells)) (PP (IN in) (NP (DT the) (NN retina)))) (VP (VBP are) (VP (VBN called) (NP (NNS rods) (CC and) (NNS cones)))) (. .)))