Loading parent XML tag values into Oracle table along with child values

   <project>
      <id>001</id>
      <name>Math Project</name>
      .
      .
       <team>
         <id>1</id>
         <name> Team Roger </name>
         .
         .
       </team>

    </project>
    <project>
      <id>002</id>
      <name>Science Project</name>
      .
      .
       <team>
         <id>2</id>
         <name> Team Alpha </name>     .
       </team>
       <team>
         <id>3</id>
         <name>Team Romeo </id>

    </project>

This is the xml I have. I am trying to load a table (teams) with team details and its corresponding parent project_id, like this:

proj_id team_id     team_name
001 1   Team Roger
002 2   Team Alpha
002 3   Team Romeo
Below is the pl/sql block I wrote:

declare
cursor proj_cur is select project_id from projects;
proj_rec proj_cur%rowtype;
begin
for proj_rec in proj_cur 
loop
INSERT INTO teams(team_id,team_name,project_id)
WITH t AS (SELECT xmltype(bfilename('TEST_DIR','SCRUM.xml'), nls_charset_id('UTF8')) xmlcol FROM dual)
SELECT  
extractValue(value(x),'*/id')team_id
,extractValue(value(x),'*/name') team_name 
,extractValue(value(y),'/project/id') project_id
FROM t,TABLE(XMLSequence(extract(t.xmlcol,'/scrumwise-export/data/account/projects/project'))) y
,TABLE(XMLSequence(extract(t.xmlcol,'/scrumwise-export/data/account/projects/project/people/teams/team'))) x 
where (extractValue(value(y),'/project/id'))='27628-0-5';
end loop;
end;

This returns a cartesian product! Any help with this is much appreciated.