Sentence:  Mercer 's Whiteman association brought him into contact with Hoagy Carmichael , whose `` Snowball '' Mercer relyriced as `` Lazybones '' , in which <WSD>form</WSD> it became a hit and marked the real beginning of Mercer 's song writing career . 
Meaning of the word marked with <WSD> tags:  any spatial attributes (especially as defined by outline)