declare namespace trainType {
	type addTrainType = {
		start_year ?: Number,
		start_month ?: Number,
		end_year  ?: Number,
		end_month  ?: Number,
		end_today  ?: Number,
		school_or_institution ?: String,
		major ?: String,
		certificate ?: String,
		awards ?: String,
		positions_held ?: String,
	}
}