How to fetch Campaign details from Activity

Hi,

Does anyone know how to fetch the Campaign details from the Activity.

When query for Activity for particular contact, we got below response :

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">

   <s:Header>

      <ActivityId CorrelationId="40763918-c4d1-4c2e-8a14-d6e291eedc8b" xmlns="http://schemas.microsoft.com/2004/09/ServiceModel/Diagnostics">9c2973db-db8f-40d6-8572-8500663ee694</ActivityId>

      <o:Security s:mustUnderstand="1" xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">

         <u:Timestamp u:Id="_0">

            <u:Created>2014-02-11T05:35:53.988Z</u:Created>

            <u:Expires>2014-02-11T05:40:53.988Z</u:Expires>

         </u:Timestamp>

      </o:Security>

   </s:Header>

   <s:Body>

      <GetActivitiesResponse xmlns="https://secure.eloqua.com/API/1.2">

         <GetActivitiesResult xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

            <DynamicActivity>

               <ActivityType>EmailSend</ActivityType>

               <Date>2014-02-03T11:24:27.907</Date>

               <DynamicAsset>

                  <AssetType>

                     <ID>57</ID>

                     <Name i:nil="true"/>

                     <Type>Email</Type>

                  </AssetType>

                  <FieldValueCollection/>

                  <Id>57</Id>

               </DynamicAsset>

               <DynamicEntity i:nil="true"/>

               <FieldValueCollection>

                  <ActivityFields>

                     <InternalName>EmailWebLink</InternalName>

                     <Value/>

                  </ActivityFields>

                  <ActivityFields>

                     <InternalName>EmailName</InternalName>

                     <Value>Demo eBay Offer</Value>

                  </ActivityFields>

                  <ActivityFields>

                     <InternalName>EmailRecipientID</InternalName>

                     <Value>2c88fba9-5804-4c79-8cc8-00a94fd12abb</Value>

                  </ActivityFields>

                  <ActivityFields>

                     <InternalName>SubjectLine</InternalName>

                     <Value>The Best of Mobile deals + 7% off coupon inside!</Value>

                  </ActivityFields>

               </FieldValueCollection>

               <Id>2</Id>

            </DynamicActivity>

            <DynamicActivity>

               <ActivityType>EmailSubscribe</ActivityType>

               <Date>2014-01-31T06:00:34.813</Date>

               <DynamicAsset>

                  <AssetType>

                     <ID>0</ID>

                     <Name i:nil="true"/>

                     <Type>Email</Type>

                  </AssetType>

                  <FieldValueCollection/>

                  <Id>0</Id>

               </DynamicAsset>

               <DynamicEntity i:nil="true"/>

               <FieldValueCollection/>

               <Id>2</Id>

            </DynamicActivity>

         </GetActivitiesResult>

      </GetActivitiesResponse>

   </s:Body>

</s:Envelope>

Now, we need to know, for which Campaign these activities were performed.

How to get those details ?

Thanks