Insert With Multiple Subqueries

Hi

what i like to do is insert in one table 2 value from 2 different row.

exp:

table1: person

id name

1  bob

2 john

 so id like to make an insert that will result in this

table 2: person_knowed

idperson1: 1

idperson2: 2

so the wuery should look something like this:

 

insert into person_knowed(idperson1, idperson2)
(select id from personwhere name = 'bob',
select id from personwhere name = 'john')); 

anybody have an idea of how to acheive this?