• Extracts from the list the specified element
• Lists within lists are considered single elements
• Counting begins at one

Example:
  (ASSIGN orthologs = (ALL-ORTHOLOGS-OF all4312))
:: (#$Tery.p-Te?3672 #$A29413.p-Av?0687 #$A7120.p-All4312 #$Npun.p-NpR3907
    #$S6803.p-Sll1330)
  (THIRD orthologs)
:: #$A7120.p-All4312

Example:
  (FOR-EACH gene IN (GENES-OF A7120)
         AS coords = (GET-ELEMENTS (FROM TO DIRECTION) FROM gene)
    COLLECT (LIST gene coords))
:: ((#$A7120.all0002 (981 1718 :B)) (#$A7120.asl0003 (2617 2805 :B))
    (#$A7120.ssrA (2858 3247 :B)) (#$A7120.all0004 (3418 4365 :B))
    (#$A7120.all0005 (4454 5974 :B)) (#$A7120.all0006 (6138 6689 :B))
    . . .
  (FIRST *)
:: (#$A7120.all0002 (981 1718 :B))