age[?] title1 title2 Add an edge to the current graph

| Examples: 
    | age title1 title2 Add an edge from the node with "title1" as title to the one with title "title2"
    | age "title1 with spaces" title2 Add an edge from node "title1 with spaces" to node "title2"
    | age- title1 title2 Remove an edge from the node with "title1" as title to the one with title "title2"
    | age? Show this help