How to get id of parent tables which haven't any foreign key with another table

Question

I have a structure of a table have many fields

table_id	name_table	name_filed	PK	FK
1	person	id	pk
1	person	name
1	person	age
2	dog	id	pk
2	dog	name
2	dog	owner		fk
3	phone	id	pk
3	phone	name
3	phone	owner		fk

How to get id(s) of parent tables which haven't any foreign key with another table in this case expected result is 1

I've tried

select distinct table_id from tables_structure where fk!=''

Also I've tried with group by

select table_id from tables_structure where fk!=''
group by table_id 
having fk!=''