( ( ( Remember - ) ( ( looking ( at ( the sun ) ) ) ( directly ( can ( cause ( ( ( ( ( serious ( eye damage ) ) or ) blindness ) and ) ( ( the ( safest way ) ) ( of ( viewing ( ( the eclipse ) ( ( is indirectly ) ( using ( a ( pinhole viewer ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (VP (VB Remember))) (: -) (S (S (VP (VBG looking) (PP (IN at) (NP (DT the) (NN sun))))) (ADVP (RB directly)) (VP (MD can) (VP (VB cause) (NP (NP (NP (JJ serious) (NN eye) (NN damage)) (CC or) (NP (NN blindness))) (CC and) (NP (NP (DT the) (JJS safest) (NN way)) (PP (IN of) (S (VP (VBG viewing) (SBAR (S (NP (DT the) (NN eclipse)) (VP (VBZ is) (ADVP (RB indirectly)) (VP (VBG using) (NP (DT a) (JJ pinhole) (NN viewer)))))))))))))) (. .)))
Remember - looking at the sun directly can cause serious eye damage or blindness and the safest way of viewing the eclipse is indirectly using a pinhole viewer.
(ROOT (S (S (VP (VBG Looking) (ADVP (RB directly)) (PP (IN at) (NP (DT the) (NN sun))))) (VP (MD can) (VP (VB cause) (NP (NN blindness)))) (. .)))