SQL & PL/SQL :: Remove Columns Which Contain Same Data

I do have a query which gives me two rows of data.(This might be more than two in other cases)

The data I get is formed as :

COUNTRY_DESCRIPTION COUNTRY_CODE EVENT_NUMBER EVENT_DATE APPLICANT
European Patent EP 101 Kiksu
European Patent EP 101 Mokilosu

What I want to get should be formed as :

COUNTRY_DESCRIPTION COUNTRY_CODE EVENT_NUMBER EVENT_DATE APPLICANT

European Patent EP 101 Kiksu
Mokilosu

As you can see, I removed the first four columns because the eventkey is the same. In this case, there is only the applicant which is different.So the rest should be blank.

The code I do use to get this data:

SELECT
TABLECOUNTRY.COUNTRYDESCRIPTION "COUNTRY_DESCRIPTION"
,TABLECOUNTRY.COUNTRYCODE "COUNTRY_CODE"
,OWNER.NAME "APPLICANT"
,CASEEVENT.EVENTNUMBER "EVENT_NUMBER"
,TO_CHAR(CASEEVENT.EVENTDATE,'DD.MM.YYYY') "EVENT_DATE"

[code]....

So what to modify in the query to get these columns of the second row blank?