Matthew 21:9-11

Matthew 21:9-11

[9] And  the multitudes  that went before,  and  that followed,  cried,  saying,  Hosanna  to the Son  of David:  Blessed  is he that cometh  in  the name  of the Lord;  Hosanna  in  the highest.  [10] And  when he  was come  into  Jerusalem,  all  the city  was moved,  saying,  Who  this?  [11] And  the multitude  This  Jesus  the prophet  of  Nazareth  of Galilee. 

What is the context of Matthew 21:9-11?