argument problem to publish msg to a certain topic

edit

hello. i roslaunch a turtlebot in an empty world, and i am trying to send data in a topic but i am having a problem. the topic is /gazebo/set_model_state, which have a type of gazebo_msgs/ModelState. so the arguments i have to include into rostopic -pub command are:

string model_name
geometry_msgs/Pose pose
  geometry_msgs/Point position
    float64 x
    float64 y
    float64 z
  geometry_msgs/Quaternion orientation
    float64 x
    float64 y
    float64 z
    float64 w
geometry_msgs/Twist twist
  geometry_msgs/Vector3 linear
    float64 x
    float64 y
    float64 z
  geometry_msgs/Vector3 angular
    float64 x
    float64 y
    float64 z
string reference_frame

i've read the tutorials, but they didn't help me with it. please, if anyone nose how to publish msg to that, help me!