Split the string

Below is the code I am running:

Get-AzDataFactoryV2Trigger -ResourceGroupName "myrg" -DataFactoryName "myadf"  | Select-Object Runtimestate, Properties.split(".",5)

Values in properties: 

Microsoft.Azure.Management.DataFactory.Models.ScheduleTrigger

I wanted to display only ScheduleTrigger

Error:

A positional parameter cannot be found that accepts argument 'System.Object[]'.

How to fix this? and also please try to simply the code. I don't want it in one line

I guess we can do something like 

$var = get-Az.. params..

 select $_.col, $_.col.split etc...

Regards,
Vaibhav