Trying to access JASON object

Trying to access JASON object

Below is a somewhat complex JASON string. I am having problem accessing the data within the object.

  2. function tryThis(){
  3.   var test= {
  4. "term0" : {
  5. "PrincipalTranslations" : {
  6. "0" :{
  7. "OriginalTerm" : { "term" : "grin", "POS" : "vi", "sense" : "smile", "usage" : ""}, 
  8. "FirstTranslation" : {"term" : "faire un large sourire, arborer un large sourire, sourire de toutes ses dents", "POS" : "vi", "sense" : "en montrant les dents"}, "Note" : ""},
  9. "1" :{
  10. "OriginalTerm" : { "term" : "grin", "POS" : "n", "sense" : "smile", "usage" : ""}, 
  11. "FirstTranslation" : {"term" : "large sourire", "POS" : "nm", "sense" : ""}, 
  12. "SecondTranslation" : {"term" : "rictus", "POS" : "nm", "sense" : "crispé"}, "Note" : ""}}},
  13. "original" : {
  14. "Compounds" : {
  15. "0" :{
  16. "OriginalTerm" : { "term" : "broad grin", "POS" : "n", "sense" : "big smile", "usage" : ""}, 
  17. "FirstTranslation" : {"term" : "large sourire", "POS" : "nm", "sense" : ""}, "Note" : ""},
  18. "1" :{
  19. "OriginalTerm" : { "term" : "grin and bear it", "POS" : "", "sense" : "", "usage" : ""}, 
  20. "FirstTranslation" : {"term" : "prendre avec le sourire", "POS" : "v", "sense" : ""}, "Note" : ""},
  21. "2" :{
  22. "OriginalTerm" : { "term" : "grin at", "POS" : "vtr", "sense" : "smile broadly at", "usage" : ""}, 
  23. "FirstTranslation" : {"term" : "faire un grand, un large sourire à", "POS" : "vtr", "sense" : ""}, "Note" : ""},
  24. "3" :{
  25. "OriginalTerm" : { "term" : "grin at", "POS" : "vtr", "sense" : "smile broadly at", "usage" : ""}, 
  26. "FirstTranslation" : {"term" : "sourire à", "POS" : "vtr", "sense" : ""}, "Note" : ""}}},
  27. "Lines" : "End Reached", "END" : true
  28. };
  29. var obj = $.parseJSON(test);  

Please comment
Thanks