how can i stop a vfx after x seconds

the title is pretty explanatory, i want to stop the vfx after 5 seconds i have no idea how to that
the code i use:

<V t="vfx">

<U n="vfx">

<V n="participant" t="from_participant">

<U n="from_participant">

<E n="participant">Actor</E>

</U>

</V>

<U n="vfx">

<T n="effect_name">ep05_rink_large_sparkles</T>

<V n="joint_name" t="Current_Position" />

<T n="play_immediate">True</T>

</U>

</U>

</V>