How to publish message with several type in yaml syntax

edit

Hi, I'm currently learning to use ROS with Gazebo and I'm working on a drone project. I'm struggling to send the right terminal command to publish a message on a particular topic.

I use ROS-Melodic on a 18.04 Ubuntu LTS version.

Here is the structure of the message:

string[] 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

I'm trying to simply publish a message on the appropriate topic using the yaml syntax but I can't make it properly.

Here is one of the multiple trial I made:

rostopic pub /gazebo/model_states gazebo_msgs/ModelStates -- '[state1]'  '[[10.0,10.0,10.0],[0.0,0.0,0.0,1.0]' '[1.0,1.0,0.0,0.0,0.0,0.0]'

I want to precise that my problem is really about the syntax and how I should write this command to publish on the topic named "gazebo/model_states" with a type message defined as "ModelStates" and described above.

I also tried the dictonnary syntax but it seems it can't work with Vector3 type as it tells me "twist must be a tuple or a list instead of: dict".

Thank you for your help.