I'm not sure if they are included as part of the DLCs, maybe Res Publica?

They are in my flavorVEN file. They read like this:

The growing power of the Council of Ten.

country_event = { id = flavor_ven.24 title = flavor_ven.24.t desc = flavor_ven.24.d picture = ELECTION_REPUBLICAN_eventPicture

fire_only_once = yes

trigger = {
    tag = VEN
    is_year = 1460
    NOT = { is_year = 1500 }
    government = merchant_republic
}

mean_time_to_happen = {
    months = 120
}   
option = {  #Curtail the power of the Ten
    name = flavor_ven.24.a
    ai_chance = { 
        factor = 1      
    }
    add_republican_tradition = 0.2
    add_country_modifier = {
        name = ven_ten_restrained
        duration = -1
    }
}
option = {  #Support the Ten
    name = flavor_ven.24.b
    ai_chance = { 
        factor = 0  
    }
    add_republican_tradition = -0.2
    add_country_modifier = {
        name = ven_council_of_ten_strong
        duration = -1
    }
}

}

Revoke the laws restraining the Ten.

country_event = { id = flavor_ven.25 title = flavor_ven.25.t desc = flavor_ven.25.d picture = DIPLOMACY_eventPicture

fire_only_once = yes

trigger = {
    tag = VEN
    government = merchant_republic
    has_country_modifier = ven_ten_restrained
}

mean_time_to_happen = {
    months = 60
}   
option = {  #The Ten must be controlled.
    name = flavor_ven.25.a
    ai_chance = { 
        factor = 0
    }
    add_stability = -1
    add_republican_tradition = 0.2
    #Keep modifier
}
option = {  #Ignore the restraining laws
    name = flavor_ven.25.b
    ai_chance = { 
        factor = 1      
    }
    add_republican_tradition = -0.2
    remove_country_modifier = ven_ten_restrained
}
option = {  #Revoke the laws restraining the ten.
    name = flavor_ven.25.c
    ai_chance = {
        factor = 0      
    }
    add_republican_tradition = -0.3
    add_adm_power = 50
    remove_country_modifier = ven_ten_restrained
}

}

Expansion of the Great Council.

country_event = { id = flavor_ven.26 title = flavor_ven.26.t desc = flavor_ven.26.d picture = DEBATE_REPUBLICAN_eventPicture

fire_only_once = yes

trigger = {
    tag = VEN
    is_year = 1520
    NOT = { is_year = 1560 }
    government = merchant_republic
}

mean_time_to_happen = {
    months = 120
}   
option = {  #Enlarge the council
    name = flavor_ven.26.a
    add_faction_influence = {
        faction = mr_traders
        influence = 20
    }
    add_country_modifier = {
        name = ven_expanded_council
        duration = -1
    }
}
option = {  #Things are working fine as it is.
    name = flavor_ven.26.b
    add_stability = 1
}

}

The Barnabotti

country_event = { id = flavor_ven.27 title = flavor_ven.27.t desc = flavor_ven.27.d picture = DEBATE_REPUBLICAN_eventPicture

fire_only_once = yes

trigger = {
    tag = VEN
    151 = {
        NOT = { owned_by = BYZ }
        NOT = { owned_by = VEN }
    }
    is_year = 1550
    OR = {
        has_country_modifier = ven_expanded_council
        163 = { owned_by = TUR }
    }
    government = merchant_republic
}

mean_time_to_happen = {
    months = 150
}   
option = {  #They won't be a problem for long with those habits.
    name = flavor_ven.27.a
    add_faction_influence = {
        faction = mr_traders
        influence = 20
    }
    add_country_modifier = {
        name = ven_barnabotti
        duration = -1
    }
}

}

Accademia della Guidecca

country_event = { id = flavor_ven.28 title = flavor_ven.28.t desc = flavor_ven.28.d picture = GREAT_BUILDING_eventPicture

fire_only_once = yes

trigger = {
    tag = VEN
    has_country_modifier = ven_barnabotti
    is_year = 1650
    NOT = { is_year = 1670 }
    government = merchant_republic
}

mean_time_to_happen = {
    months = 120
}   
option = {  #Create the Accademia della Guidecca
    name = flavor_ven.28.a
    add_faction_influence = {
        faction = mr_aristocrats
        influence = 10
    }
    add_country_modifier = {
        name = ven_accademia_della_guidecca
        duration = -1
    }
    add_years_of_income = -0.1
}
option = {  #They should be content with their pensions.
    name = flavor_ven.28.b
    add_stability = 1
}

}