1.0GRAINhttps://grain-africa.org/frGrainhttps://grain-africa.org/fr/author/grain/rich600338<blockquote class="wp-embedded-content" data-secret="r1OfF2cj4d"><a href="https://grain-africa.org/fr/team-members/hempstone-tinga/">Hempstone Tinga</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://grain-africa.org/fr/team-members/hempstone-tinga/embed/#?secret=r1OfF2cj4d" width="600" height="338" title="« Hempstone Tinga » — GRAIN" data-secret="r1OfF2cj4d" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://grain-africa.org/wp-includes/js/wp-embed.min.js </script> https://grain-africa.org/wp-content/uploads/2026/09/unnamed-7.jpg8961194Hempstone Tinga is a statistician-turned-entrepreneur specializing in human data operations for Artificial Intelligence. He is the Founder of riengAI, a startup supporting AI companies with high-quality data collection, transcription, speech data collection, image annotation, and data validation. With experience in crowd testing and community management, Hempstone focuses on the human dimension of AI and on ... Lire la suite